y=(x-7)(x+9)

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Solution for y=(x-7)(x+9) equation:


Simplifying
y = (x + -7)(x + 9)

Reorder the terms:
y = (-7 + x)(x + 9)

Reorder the terms:
y = (-7 + x)(9 + x)

Multiply (-7 + x) * (9 + x)
y = (-7(9 + x) + x(9 + x))
y = ((9 * -7 + x * -7) + x(9 + x))
y = ((-63 + -7x) + x(9 + x))
y = (-63 + -7x + (9 * x + x * x))
y = (-63 + -7x + (9x + x2))

Combine like terms: -7x + 9x = 2x
y = (-63 + 2x + x2)

Solving
y = -63 + 2x + x2

Solving for variable 'y'.

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

Simplifying
y = -63 + 2x + x2

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