Simplify frac 324 - 4x 2 2x 18 - JAMB Mathematics 2020 Question
Simplify \(\frac{324 - 4x^2}{2x + 18}\)
A
2(x - 9)
B
2(9 + x)
C
81 - x\(^2\)
D
-2(x - 9)
correct option: d
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234 - 4x\(^2\) = 18\(^2\) - (2x)\(^2\) = (18 - 2x)(18 + 2x)
2x + 18 = 2x + 18 = (2x + 18)
18 - 2x = 2(a - x)
= -2(x - a)
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