3x+12=2x^2-2

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Solution for 3x+12=2x^2-2 equation:


Simplifying
3x + 12 = 2x2 + -2

Reorder the terms:
12 + 3x = 2x2 + -2

Reorder the terms:
12 + 3x = -2 + 2x2

Solving
12 + 3x = -2 + 2x2

Solving for variable 'x'.

Reorder the terms:
12 + 2 + 3x + -2x2 = -2 + 2x2 + 2 + -2x2

Combine like terms: 12 + 2 = 14
14 + 3x + -2x2 = -2 + 2x2 + 2 + -2x2

Reorder the terms:
14 + 3x + -2x2 = -2 + 2 + 2x2 + -2x2

Combine like terms: -2 + 2 = 0
14 + 3x + -2x2 = 0 + 2x2 + -2x2
14 + 3x + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
14 + 3x + -2x2 = 0

Factor a trinomial.
(7 + -2x)(2 + x) = 0

Subproblem 1

Set the factor '(7 + -2x)' equal to zero and attempt to solve: Simplifying 7 + -2x = 0 Solving 7 + -2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -2x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -2x = 0 + -7 -2x = 0 + -7 Combine like terms: 0 + -7 = -7 -2x = -7 Divide each side by '-2'. x = 3.5 Simplifying x = 3.5

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 = {3.5, -2}

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