0
x^2 - 4 = 0
What you have to recognise is that the constant '4' is a 'squared number.
4 = 2^2
So we can write
x^2 - 2^2 = 0
Next remember that two squared terms with negative between then, factors.
Hence
x^2 - 2^2 = 0
=>
( x - 2)(x + 2) = 0
NB Note the plus (+) sign in the second bracket.
Hence
x - 2 = 0
x = 2
&
x + 2 = 0
x = -2
So 'x' can take two values, they are '(+)2, & -2'.
NB Note that two squared terms with a plus(+) between then , does NOT factor. e.g. the Pythagorean equation. c^2 = a^2 + b^2
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What is the value of x in x plus 0 equals 5?
X = 5
What is the value of x in the equation x4-16x3-14x2-12x-10 equals 0?
The value of x would be 0
What is the value of y in x equals -6 and x plus y equals 0?
y = 6
What is the absolute value of x equals -x?
It is not possible to be certain. If x >= 0 then abs(x) = x if x < 0 then abs(x) = -x
What is the value of x when -5sin2x equals 0?
well 5x2=10 and anything x 0=0 so x=0 because 10x0=0
What is the value of x in x plus 0 equals 5?
X = 5
What is the value of x in the equation x4-16x3-14x2-12x-10 equals 0?
The value of x would be 0
What is the value of y in x equals -6 and x plus y equals 0?
y = 6
What is the value of the expression x equals 4 and y equals 3?
The value is 1 if (x, y) = (4, 3) and 0 otherwise.
What is the absolute value of x equals -x?
It is not possible to be certain. If x >= 0 then abs(x) = x if x < 0 then abs(x) = -x
What is the value of x when -5sin2x equals 0?
well 5x2=10 and anything x 0=0 so x=0 because 10x0=0
If -1 equals x equals 2 and 1 equals y equals 3 then least value of 2y-3x is?
here for least value X=2,y=3hence 2(3)-3(2)=0=0
Why For x less than 0 the absolute value of x equals negative x please explain?
That is how the absolute value is defined. For x < 0 the value of x is negative (by definition). Therefore, the value of negative x is positive (negative of a negative). So abs(x) = -x when x < 0
What is x-x-7 equals 0?
There is no answer to this (for any value of x) That's because x-x = 0 So x-x-7 is always -7, and never 0
What is x in the equation x squared minus forty-nine equals 0?
The value of x is 7
1 plus x plus x2 plus x3 plus x4 plus plus x24 equals 49x25?
No.
How do you find the value of 16 x 0?
0 By the multiplication property of 0, any number multiplied by 0 equals 0
