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when you're doing a problem like that use this trick. let's say you have 3 to the -7 power minus 3 to the 4 power. -7 - 4 can also be shown as -7 + -4. i switched the minus sign to a plus sign and because i did that, i had to switch the positive 4 to a negative 4. so i got 3 to the -7 power plus 3 to the -4 power.

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โˆ™ 2011-04-24 20:57:26
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Q: Why is a negative exponent minus a positive exponent a negative exponent?
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Related questions

The quotient of a negative integer and a positive integer is?

The quotient of a positive integer by a negative is always negative. Say this to yourself a couple times: "MULTIPLICATION: minus times minus is plus (negative x negative = positive).....minus times plus is minus (negative x positive = negative).....plus times plus is plus (positive x positive = positive) DIVISION: minus divi minus is plus (negative ÷ negative = positive)......minus divi plus is minus (negative ÷ positive = negative).....plus divi plus is plus (positive ÷ positive = positive)"


Why is the product of a positive integer and a negative integer a negative integer?

I honestly don't know :D but heres something to help you "MULTIPLICATION: minus times minus is plus (negative x negative = positive).....minus times plus is minus (negative x positive = negative).....plus times plus is plus (positive x positive = positive) DIVISION: minus divi minus is plus (negative ÷ negative = positive)......minus divi plus is minus (negative ÷ positive = negative).....plus divi plus is plus (positive ÷ positive = positive)"


What is a positive minus a positive?

It depends. (a) a positive minus a smaller positive is positive, (b) a positive minus a positive of the same size is zero, and (c) a positive minus a bigger positive is negative. For example, (a) 8 - 6 = 2 (b) 8 - 8 = 0 (c) 8 - 11 = -3


What is a poitive minus a negative?

A positive minus a negative is a positive.


How are multiplying integers and dividing integers same?

following multiplication integer rules and division rules, you should get: "MULTIPLICATION: minus times minus is plus (negative x negative = positive).....minus times plus is minus (negative x positive = negative).....plus times plus is plus (positive x positive = positive) DIVISION: minus divi minus is plus (negative ÷ negative = positive)......minus divi plus is minus (negative ÷ positive = negative).....plus divi plus is plus (positive ÷ positive = positive)" a division problem is a multiplication problem in disguise


Why does a positive minus a negative equal a positive?

Because "minus a negative" is tha same as "plus a positive". So, a positive minus a negative is a positive plus a positive which is a positive.


What is a positive integer times a negative integer?

When you multiply a negative number by a positive number then the product is always negative. When you multiply a positive number by a negative number then the product is always negative. ( - 2 ) ( + 3 ) = - 6 ( - 4 ) ( 1 ) = - 4 ( - 1 ) 2 = - 2 ( + 2 ) ( - 2 ) = - 4 ( 3 ) ( - 2 ) = - 6 4 ( - 2 ) = - 8


What is positive 3 plus negative 5 minus negative 2 minus positive 4?

Positive 3 plus negative 5 minus negative 2 minus positive 4 is equal to -4.


What is x to the power minus 0.5?

A negative exponent means the same as a positive exponent in the denominator. Thus, x-0.5 = 1/x0.5. This, in turn, is equivalent to 1/(square root of x).


What is negative 18 minus positive 12?

Negative 18 minus positive 12 is negative 30.


What is negative 4 minus positive 15?

Negative 4 minus positive 15 = negative 19


When squaring a negative number if the factor is a negative and the exponent is positive will your answer be negative or positive?

If you square any real number it will always be positive.


What is negative minus positive?

A negative minus a positive is a negative. i.e -1-(+1)= -2


What is negative 4 minus positive 21?

the answer of negative 4 minus positive 21 is positive 25 because you leave the negative 4 as is, change the minus to a plus, and change positive 21 to negative 21. (Leave Change Change)


How do you raise anumber to a negative exponent?

A number to a negative exponent is the inverse of the number to the positive exponent. That is, x-a = 1/xa


What are negative intergery exponents?

I assume you mean "negative integer exponents".It means that: * It is an exponent * It is an integer (whole number) * It is negative (less than zero, i.e., with a minus sign) A negative exponent is defined as the reciprocal of the positive exponent. For example, 10 to the power -5 is the same as 1 / (10 to the power 5).


Is negative 265 minus negative 728 positive or negative?

Positive: -265 minus -728 is 463.


What does a negative number minus a positive number equal?

A negative number minus a positive number will always be a negative number.


Does a positive minus a negative equal a positive or negative?

Always positive.


What sign is the answer to a minus divided by a minus?

a negative divided or multiplied by a negative is a positive a negative and a positive multiplied or divided by each other is a negative a negative divided or multiplied by a negative is a positive a negative and a positive multiplied or divided by each other is a negative


What if the problem is a fraction with a negative exponent?

Flip the fraction top-to-bottom, and delete the minus sign from the exponent.


A positive plus a positive equals?

A positive plus a positive will equal a positive. However a negative minus a negative will not equal a negative. It will equal a positive.


What is a negative minus a negative?

A negative minus a negative turns the latter into a plus positive,for example -6 minus -3 would be :-6 ++ 3 = -3A minus negative always turns into a plus positive...To get more Specific:Suppose x and y are two POSITIVE numbers so that -x and -y are negative. Then a negative minus a negative = (-x) - (-y) = -x +yIf x > y the answer is negativeIf x = y the answer is zeroIf x < y the answer is positive


Is a negative minuse a negative a positive?

Negative times a Negative is a Positive. Negative minus a Negative is a Negative.


What is positive 6 minus negative 2?

Minus a negative means you can plus a positive so therefore the answer would be positive 8.