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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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12y ago

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