x^2+7=2x^2-x-5

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Solution for x^2+7=2x^2-x-5 equation:


Simplifying
x2 + 7 = 2x2 + -1x + -5

Reorder the terms:
7 + x2 = 2x2 + -1x + -5

Reorder the terms:
7 + x2 = -5 + -1x + 2x2

Solving
7 + x2 = -5 + -1x + 2x2

Solving for variable 'x'.

Reorder the terms:
7 + 5 + x + x2 + -2x2 = -5 + -1x + 2x2 + 5 + x + -2x2

Combine like terms: 7 + 5 = 12
12 + x + x2 + -2x2 = -5 + -1x + 2x2 + 5 + x + -2x2

Combine like terms: x2 + -2x2 = -1x2
12 + x + -1x2 = -5 + -1x + 2x2 + 5 + x + -2x2

Reorder the terms:
12 + x + -1x2 = -5 + 5 + -1x + x + 2x2 + -2x2

Combine like terms: -5 + 5 = 0
12 + x + -1x2 = 0 + -1x + x + 2x2 + -2x2
12 + x + -1x2 = -1x + x + 2x2 + -2x2

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

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

Factor a trinomial.
(4 + -1x)(3 + x) = 0

Subproblem 1

Set the factor '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4

Subproblem 2

Set the factor '(3 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 x = -3 Simplifying x = -3

Solution

x = {4, -3}

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