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You may cancel it out PROVIDED you know that it is not 0.

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14y ago
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Q: Why it is improper to cancel out the x in a rational expression?
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Related questions

How do you determine whether an expression is rational algebraic expression or not?

If the algebraic expression can be written in the form of a(x)/b(x) where a(x) and b(x) are polynomial functions of x and b(x) ≠ 0, then the expression is a rational algebraic expression.


Is a rational number is a rational expression?

Any number that can be expressed as a fraction is a rational number otherwise it is an irrational number.


What is equal to the rational expression below when x 2 or 3?

I can see no rational expression below.


How do you multiply rational algebraic expression?

Multiplying Rational Expressions After studying this lesson, you will be able to: * Multiply rational expressions. Steps to multiply a rational expression: 1. Cancel numerator to denominator if possible (don't cancel parts of a binomial or trinomial) 2. Factor the numerators and denominators if possible. 3. Multiply straight across - remember, you don't need a common denominator to multiply fractions (or rational expressions). Example 1 Nothing will cancel. Nothing will factor. All we have to do is multiply. This is the simplified answer. Example 2 We can do some canceling and reducing in this problem. 2 and 16 reduces; 9 and 3 reduces, reduce the variables. Now, we multiply. This is the simplified expression. Example 3 We can reduce 12 and 3 and reduce the variables Now, factor the second denominator. Cancel the identical binomials (x + 5 ) This is the simplified expression. Example 4 Factor Cancel the identical binomials. This is the simplified expression. Example 5Factor Cancel the identical binomials. This is the simplified expression. THIS WAS MADE BY: www.algebra-online.com/multiplying-rational-expressions-1.htm Hope this helped !


For what value of x is the rational expression below undefined?

6


How do you write a rational expression that is undefined when x equals 4 and x equals 0?

One possible expression is [ 1/(x - 4)+ 1/x ].


What is equal to the rational expression when x -2 or -6?

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What is a quotient of the rational expression x plus 2 over x plus 8?

That one, there!


For what value of x is the rational expression below equal to zero?

2


What is the value of the rational expression below when x is equal to 3?

4


What is equal to the rational expression when x negative 4 or 3?

The answer is given below.


Are the any values for x for which each rational expression is undefined xoverx plus 8?

The expression X/(X+8) is undefined at X=-8, because that would be division by zero.