x^2-9x+18=(x-3)(x+6)

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Solution for x^2-9x+18=(x-3)(x+6) equation:


Simplifying
x2 + -9x + 18 = (x + -3)(x + 6)

Reorder the terms:
18 + -9x + x2 = (x + -3)(x + 6)

Reorder the terms:
18 + -9x + x2 = (-3 + x)(x + 6)

Reorder the terms:
18 + -9x + x2 = (-3 + x)(6 + x)

Multiply (-3 + x) * (6 + x)
18 + -9x + x2 = (-3(6 + x) + x(6 + x))
18 + -9x + x2 = ((6 * -3 + x * -3) + x(6 + x))
18 + -9x + x2 = ((-18 + -3x) + x(6 + x))
18 + -9x + x2 = (-18 + -3x + (6 * x + x * x))
18 + -9x + x2 = (-18 + -3x + (6x + x2))

Combine like terms: -3x + 6x = 3x
18 + -9x + x2 = (-18 + 3x + x2)

Add '-1x2' to each side of the equation.
18 + -9x + x2 + -1x2 = -18 + 3x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
18 + -9x + 0 = -18 + 3x + x2 + -1x2
18 + -9x = -18 + 3x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
18 + -9x = -18 + 3x + 0
18 + -9x = -18 + 3x

Solving
18 + -9x = -18 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
18 + -9x + -3x = -18 + 3x + -3x

Combine like terms: -9x + -3x = -12x
18 + -12x = -18 + 3x + -3x

Combine like terms: 3x + -3x = 0
18 + -12x = -18 + 0
18 + -12x = -18

Add '-18' to each side of the equation.
18 + -18 + -12x = -18 + -18

Combine like terms: 18 + -18 = 0
0 + -12x = -18 + -18
-12x = -18 + -18

Combine like terms: -18 + -18 = -36
-12x = -36

Divide each side by '-12'.
x = 3

Simplifying
x = 3

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