Question
Answer
$$\dfrac{x^2+10x-11}{x^2+7x-8}=\dfrac{x+11}{x+8}$$
Explanation
| $$ \begin{aligned}\frac{x^2+10x-11}{x^2+7x-8}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{x+11}{x+8}\end{aligned} $$ | |
| ① | Simplify $ \dfrac{x^2+10x-11}{x^2+7x-8} $ to $ \dfrac{x+11}{x+8} $. Factor both the denominator and the numerator, then cancel the common factor. $\color{blue}{x-1}$. $$ \begin{aligned} \frac{x^2+10x-11}{x^2+7x-8} & =\frac{ \left( x+11 \right) \cdot \color{blue}{ \left( x-1 \right) }}{ \left( x+8 \right) \cdot \color{blue}{ \left( x-1 \right) }} = \\[1ex] &= \frac{x+11}{x+8} \end{aligned} $$ |
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Simplify Rational Expressions