y=(x+3)(x-12)

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Solution for y=(x+3)(x-12) equation: 


Simplifying
y = (x + 3)(x + -12)

Reorder the terms:
y = (3 + x)(x + -12)

Reorder the terms:
y = (3 + x)(-12 + x)

Multiply (3 + x) * (-12 + x)
y = (3(-12 + x) + x(-12 + x))
y = ((-12 * 3 + x * 3) + x(-12 + x))
y = ((-36 + 3x) + x(-12 + x))
y = (-36 + 3x + (-12 * x + x * x))
y = (-36 + 3x + (-12x + x2))

Combine like terms: 3x + -12x = -9x
y = (-36 + -9x + x2)

Solving
y = -36 + -9x + x2

Solving for variable 'y'.

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

Simplifying
y = -36 + -9x + x2

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