y=(x+2)(x-1)

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Solution for y=(x+2)(x-1) equation: 


Simplifying
y = (x + 2)(x + -1)

Reorder the terms:
y = (2 + x)(x + -1)

Reorder the terms:
y = (2 + x)(-1 + x)

Multiply (2 + x) * (-1 + x)
y = (2(-1 + x) + x(-1 + x))
y = ((-1 * 2 + x * 2) + x(-1 + x))
y = ((-2 + 2x) + x(-1 + x))
y = (-2 + 2x + (-1 * x + x * x))
y = (-2 + 2x + (-1x + x2))

Combine like terms: 2x + -1x = 1x
y = (-2 + 1x + x2)

Solving
y = -2 + 1x + x2

Solving for variable 'y'.

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

Simplifying
y = -2 + 1x + x2

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