28+x^2=(x-6)(x-2)

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Solution for 28+x^2=(x-6)(x-2) equation:


Simplifying
28 + x2 = (x + -6)(x + -2)

Reorder the terms:
28 + x2 = (-6 + x)(x + -2)

Reorder the terms:
28 + x2 = (-6 + x)(-2 + x)

Multiply (-6 + x) * (-2 + x)
28 + x2 = (-6(-2 + x) + x(-2 + x))
28 + x2 = ((-2 * -6 + x * -6) + x(-2 + x))
28 + x2 = ((12 + -6x) + x(-2 + x))
28 + x2 = (12 + -6x + (-2 * x + x * x))
28 + x2 = (12 + -6x + (-2x + x2))

Combine like terms: -6x + -2x = -8x
28 + x2 = (12 + -8x + x2)

Add '-1x2' to each side of the equation.
28 + x2 + -1x2 = 12 + -8x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
28 + 0 = 12 + -8x + x2 + -1x2
28 = 12 + -8x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
28 = 12 + -8x + 0
28 = 12 + -8x

Solving
28 = 12 + -8x

Solving for variable 'x'.

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

Add '8x' to each side of the equation.
28 + 8x = 12 + -8x + 8x

Combine like terms: -8x + 8x = 0
28 + 8x = 12 + 0
28 + 8x = 12

Add '-28' to each side of the equation.
28 + -28 + 8x = 12 + -28

Combine like terms: 28 + -28 = 0
0 + 8x = 12 + -28
8x = 12 + -28

Combine like terms: 12 + -28 = -16
8x = -16

Divide each side by '8'.
x = -2

Simplifying
x = -2

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