Simplify \(\frac{324 – 4x^2}{2x + 18}\)
- 2(x - 9)
- 2(9 + x)
- 81 - x2
-
-2(x - 9)
The correct answer is: D
Explanation
\(\frac{324 - 4x^2}{2x + 18}\) = \(\frac{18^2 - (2x)^2}{2x + 18}\)
= \(\frac{(18 - 2x)(18 + 2x)}{(2x + 18)}\)
18 - 2x = 2(9 - x)
or -2(x - 9)