-142
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x2+24x+144 = 9 x2+24x+144-9 = 0 x2+24x+135 = 0 (x+9)(x+15) = 0 x = -9 or x = -15
Easy, peasy! x2 + 7x - 144 = (x + 16)(x - 9).
x2 + y2 = 144 = radius squared radius = sqrt (144) = 12 diameter = 2 x radius = 24
x2+7x+12
please help on this x2+6x+27=