x^2-16x+63=(x-7)(x+9)

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Solution for x^2-16x+63=(x-7)(x+9) equation:


Simplifying
x2 + -16x + 63 = (x + -7)(x + 9)

Reorder the terms:
63 + -16x + x2 = (x + -7)(x + 9)

Reorder the terms:
63 + -16x + x2 = (-7 + x)(x + 9)

Reorder the terms:
63 + -16x + x2 = (-7 + x)(9 + x)

Multiply (-7 + x) * (9 + x)
63 + -16x + x2 = (-7(9 + x) + x(9 + x))
63 + -16x + x2 = ((9 * -7 + x * -7) + x(9 + x))
63 + -16x + x2 = ((-63 + -7x) + x(9 + x))
63 + -16x + x2 = (-63 + -7x + (9 * x + x * x))
63 + -16x + x2 = (-63 + -7x + (9x + x2))

Combine like terms: -7x + 9x = 2x
63 + -16x + x2 = (-63 + 2x + x2)

Add '-1x2' to each side of the equation.
63 + -16x + x2 + -1x2 = -63 + 2x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
63 + -16x + 0 = -63 + 2x + x2 + -1x2
63 + -16x = -63 + 2x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
63 + -16x = -63 + 2x + 0
63 + -16x = -63 + 2x

Solving
63 + -16x = -63 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
63 + -16x + -2x = -63 + 2x + -2x

Combine like terms: -16x + -2x = -18x
63 + -18x = -63 + 2x + -2x

Combine like terms: 2x + -2x = 0
63 + -18x = -63 + 0
63 + -18x = -63

Add '-63' to each side of the equation.
63 + -63 + -18x = -63 + -63

Combine like terms: 63 + -63 = 0
0 + -18x = -63 + -63
-18x = -63 + -63

Combine like terms: -63 + -63 = -126
-18x = -126

Divide each side by '-18'.
x = 7

Simplifying
x = 7

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