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(x-9)(X+8)
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x2 + 49 = 0 ∴ x2 = -49 ∴ x = 7i
x2+3=124 x2=121 x= square root(121) x=11
(x + 12)(x - 6) = 0 x = 6 or -12
There is no integer solution. Quadratic formula gives x = -17.66 or 5.66
x2≤64