y=9(x-1)(x+7)

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Solution for y=9(x-1)(x+7) equation: 


Simplifying
y = 9(x + -1)(x + 7)

Reorder the terms:
y = 9(-1 + x)(x + 7)

Reorder the terms:
y = 9(-1 + x)(7 + x)

Multiply (-1 + x) * (7 + x)
y = 9(-1(7 + x) + x(7 + x))
y = 9((7 * -1 + x * -1) + x(7 + x))
y = 9((-7 + -1x) + x(7 + x))
y = 9(-7 + -1x + (7 * x + x * x))
y = 9(-7 + -1x + (7x + x2))

Combine like terms: -1x + 7x = 6x
y = 9(-7 + 6x + x2)
y = (-7 * 9 + 6x * 9 + x2 * 9)
y = (-63 + 54x + 9x2)

Solving
y = -63 + 54x + 9x2

Solving for variable 'y'.

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

Simplifying
y = -63 + 54x + 9x2

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