0
Anonymous
(x + 12)(x - 6) = 0
x = 6 or -12
Wiki User
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x2 + 7x = 2x2 + 6 x2 - 2x2 + 7x = 6 -x2 +7x - 6 = 0 or alternatively x2 - 7x + 6 = 0
-2
x2 + 49 = 0 ∴ x2 = -49 ∴ x = 7i
No.
168