y=-2(x-9)(x+7)

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Solution for y=-2(x-9)(x+7) equation: 


Simplifying
y = -2(x + -9)(x + 7)

Reorder the terms:
y = -2(-9 + x)(x + 7)

Reorder the terms:
y = -2(-9 + x)(7 + x)

Multiply (-9 + x) * (7 + x)
y = -2(-9(7 + x) + x(7 + x))
y = -2((7 * -9 + x * -9) + x(7 + x))
y = -2((-63 + -9x) + x(7 + x))
y = -2(-63 + -9x + (7 * x + x * x))
y = -2(-63 + -9x + (7x + x2))

Combine like terms: -9x + 7x = -2x
y = -2(-63 + -2x + x2)
y = (-63 * -2 + -2x * -2 + x2 * -2)
y = (126 + 4x + -2x2)

Solving
y = 126 + 4x + -2x2

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Simplifying
y = 126 + 4x + -2x2

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