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Anonymous
if x2 + 7 = 37, then x2 = 29 and x = ±√29
Wiki User
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x2+6x-7 = 0 (x+3)2-7 = 0 (x+3)2-7-9 = 0 (x+3)2 = 16 x+3 = + or - 4 x = - 3 + or - 4 x = 1 or -7
C and D
2x2+7/x1
2x = -7 - 8y
(x + 7)(x - 5)