-1=2x^2-x-1

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Solution for -1=2x^2-x-1 equation:


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

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

Add '1' to each side of the equation.
-1 + 1 = -1 + -1x + 1 + 2x2

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

Reorder the terms:
0 = -1 + 1 + -1x + 2x2

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

Solving
0 = -1x + 2x2

Solving for variable 'x'.
Remove the zero:
x + -2x2 = -1x + 2x2 + x + -2x2

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

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

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

Factor out the Greatest Common Factor (GCF), 'x'.
x(1 + -2x) = 0

Subproblem 1

Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0

Subproblem 2

Set the factor '(1 + -2x)' equal to zero and attempt to solve: Simplifying 1 + -2x = 0 Solving 1 + -2x = 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 + -2x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -2x = 0 + -1 -2x = 0 + -1 Combine like terms: 0 + -1 = -1 -2x = -1 Divide each side by '-2'. x = 0.5 Simplifying x = 0.5

Solution

x = {0, 0.5}

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