x*x-2=2x+1

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Solution for x*x-2=2x+1 equation:


Simplifying
x * x + -2 = 2x + 1

Multiply x * x
x2 + -2 = 2x + 1

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

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

Solving
-2 + x2 = 1 + 2x

Solving for variable 'x'.

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

Combine like terms: -2 + -1 = -3
-3 + -2x + x2 = 1 + 2x + -1 + -2x

Reorder the terms:
-3 + -2x + x2 = 1 + -1 + 2x + -2x

Combine like terms: 1 + -1 = 0
-3 + -2x + x2 = 0 + 2x + -2x
-3 + -2x + x2 = 2x + -2x

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

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

Subproblem 1

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

Subproblem 2

Set the factor '(3 + -1x)' equal to zero and attempt to solve: Simplifying 3 + -1x = 0 Solving 3 + -1x = 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 + -1x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x = 0 + -3 -1x = 0 + -3 Combine like terms: 0 + -3 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3

Solution

x = {-1, 3}

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