y=(x+3)(x-4)

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Solution for y=(x+3)(x-4) equation: 


Simplifying
y = (x + 3)(x + -4)

Reorder the terms:
y = (3 + x)(x + -4)

Reorder the terms:
y = (3 + x)(-4 + x)

Multiply (3 + x) * (-4 + x)
y = (3(-4 + x) + x(-4 + x))
y = ((-4 * 3 + x * 3) + x(-4 + x))
y = ((-12 + 3x) + x(-4 + x))
y = (-12 + 3x + (-4 * x + x * x))
y = (-12 + 3x + (-4x + x2))

Combine like terms: 3x + -4x = -1x
y = (-12 + -1x + x2)

Solving
y = -12 + -1x + x2

Solving for variable 'y'.

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

Simplifying
y = -12 + -1x + x2

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