Question
Simplify each expression. Then determine whether the given answer is correct.$$\frac{100-x^{2}}{x-10} ; \text { Answer: }-10-x$$
Step 1
The difference of squares formula is a^2 - b^2 = (a - b)(a + b). In this case, a is 10 and b is x. So, we can rewrite 100 - x^2 as (10 - x)(10 + x). So, the expression becomes: $$ \frac{(10-x)(10+x)}{x-10} $$ Show more…
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