y=-3(x+1)(x-8)

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Solution for y=-3(x+1)(x-8) equation: 


Simplifying
y = -3(x + 1)(x + -8)

Reorder the terms:
y = -3(1 + x)(x + -8)

Reorder the terms:
y = -3(1 + x)(-8 + x)

Multiply (1 + x) * (-8 + x)
y = -3(1(-8 + x) + x(-8 + x))
y = -3((-8 * 1 + x * 1) + x(-8 + x))
y = -3((-8 + 1x) + x(-8 + x))
y = -3(-8 + 1x + (-8 * x + x * x))
y = -3(-8 + 1x + (-8x + x2))

Combine like terms: 1x + -8x = -7x
y = -3(-8 + -7x + x2)
y = (-8 * -3 + -7x * -3 + x2 * -3)
y = (24 + 21x + -3x2)

Solving
y = 24 + 21x + -3x2

Solving for variable 'y'.

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

Simplifying
y = 24 + 21x + -3x2

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