Factorize x 2 + 4x - 192
MATHEMATICS
WAEC 1990
Factorize x2 + 4x - 192
- A. (x-4) (x+48)
- B. (x-48) (x+4)
- C. (x-12) (x+16)
- D. (x-12) (x-16)
Correct Answer: C. (x-12) (x+16)
Explanation
x2 + 4x - 192
x2 + 16x - 12x - 192
x(x + 16) - 12(x + 16)
(x + 16)(x - 12)
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