y=(x-3)(x-9)

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Solution for y=(x-3)(x-9) equation: 


Simplifying
y = (x + -3)(x + -9)

Reorder the terms:
y = (-3 + x)(x + -9)

Reorder the terms:
y = (-3 + x)(-9 + x)

Multiply (-3 + x) * (-9 + x)
y = (-3(-9 + x) + x(-9 + x))
y = ((-9 * -3 + x * -3) + x(-9 + x))
y = ((27 + -3x) + x(-9 + x))
y = (27 + -3x + (-9 * x + x * x))
y = (27 + -3x + (-9x + x2))

Combine like terms: -3x + -9x = -12x
y = (27 + -12x + x2)

Solving
y = 27 + -12x + x2

Solving for variable 'y'.

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

Simplifying
y = 27 + -12x + x2

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