Solve for x: (x2 + 2x + 1) = 25
-
A.
-6, -4 -
B.
6, -4 -
C.
6, 4 -
D.
-6, 4 -
E.
5, 5
Correct Answer: Option D
Explanation
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 + 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