I think the answer is either 7776 or 0
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10x2 - 64 = 36x + 6x2Subtract 6x2 from both sides:4x2 - 64 = 36xSubtract 36x from both sides:4x2 - 36x - 64 = 0Divide everything by 4:x2 - 9x - 16 = 0Use the quadratic formula:x = (9±√(92-4(-16)))/(2)x = (9-√(145))/2 or x = (9+√(145))/2
first derivative = 6x2 + 6x - 36 factors are (6x + 18)(x - 2)
36 multiplied by 18 is 648.
6x2-24=0 6(x2-4)=0 x= {-2,2}
6x2 + 9x = 0 3x(2x + 3) = 0 3x = 0 or 2x + 3 = 0 x = 0 or x = -3/2