0=x^2-12x-28

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Solution for 0=x^2-12x-28 equation:


Simplifying
0 = x2 + -12x + -28

Reorder the terms:
0 = -28 + -12x + x2

Solving
0 = -28 + -12x + x2

Solving for variable 'x'.

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

Reorder the terms:
28 + 12x + -1x2 = -28 + 28 + -12x + 12x + x2 + -1x2

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

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

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

Factor a trinomial.
(14 + -1x)(2 + x) = 0

Subproblem 1

Set the factor '(14 + -1x)' equal to zero and attempt to solve: Simplifying 14 + -1x = 0 Solving 14 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-14' to each side of the equation. 14 + -14 + -1x = 0 + -14 Combine like terms: 14 + -14 = 0 0 + -1x = 0 + -14 -1x = 0 + -14 Combine like terms: 0 + -14 = -14 -1x = -14 Divide each side by '-1'. x = 14 Simplifying x = 14

Subproblem 2

Set the factor '(2 + x)' equal to zero and attempt to solve: Simplifying 2 + x = 0 Solving 2 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + x = 0 + -2 x = 0 + -2 Combine like terms: 0 + -2 = -2 x = -2 Simplifying x = -2

Solution

x = {14, -2}

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