10x2 - 64 = 36x + 6x2
Subtract 6x2 from both sides:
4x2 - 64 = 36x
Subtract 36x from both sides:
4x2 - 36x - 64 = 0
Divide everything by 4:
x2 - 9x - 16 = 0
Use the quadratic formula:
x = (9±√(92-4(-16)))/(2)
x = (9-√(145))/2 or x = (9+√(145))/2
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x + 36 = 82x = 82 - 36x = 46
The expression is likely 4x2 - 36x +81 which is the same as (2x - 9)(2x - 9) or (2x - 9)2
sqrt(x + 2) = 6x + 2 = 36x = 34whew !
3x2 + 36x + 81 = 3(x2 + 13x + 27)
32 - 121 - 64 = 36x => -153 = 36x so that x = -4.25