-2x^2=x-1

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

Simplifying
-2x2 = x + -1

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

Solving
-2x2 = -1 + x

Solving for variable 'x'.

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

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

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

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

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

Subproblem 1
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
Subproblem 2
Set the factor '(1 + x)' equal to zero and attempt to solve:

Simplifying
1 + x = 0

Solving
1 + x = 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 + x = 0 + -1

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

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

Simplifying
x = -1
Solution
x = {0.5, -1}