Solve for x x2 2x 1 25 - WAEC Mathematics 1989 Question
Solve for x: (x2 + 2x + 1) = 25
A
-6, -4
B
6, -4
C
6, 4
D
-6, 4
correct option: d
x2 + 2x + 1 = 25
x2 + 6x - 4x -24= 0
x(x + 6) - 4(x + 6) = 0
(x - 4) - (x + 6) = 0
x = 4 or -6 = -6,4
x2 + 6x - 4x -24= 0
x(x + 6) - 4(x + 6) = 0
(x - 4) - (x + 6) = 0
x = 4 or -6 = -6,4
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