x^2-x=-20

Simple and best practice solution for x^2-x=-20 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for x^2-x=-20 equation:


Simplifying
x2 + -1x = -20

Reorder the terms:
-1x + x2 = -20

Solving
-1x + x2 = -20

Solving for variable 'x'.

Reorder the terms:
20 + -1x + x2 = -20 + 20

Combine like terms: -20 + 20 = 0
20 + -1x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-20' to each side of the equation.
20 + -1x + -20 + x2 = 0 + -20

Reorder the terms:
20 + -20 + -1x + x2 = 0 + -20

Combine like terms: 20 + -20 = 0
0 + -1x + x2 = 0 + -20
-1x + x2 = 0 + -20

Combine like terms: 0 + -20 = -20
-1x + x2 = -20

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = -20 + 0.25

Reorder the terms:
0.25 + -1x + x2 = -20 + 0.25

Combine like terms: -20 + 0.25 = -19.75
0.25 + -1x + x2 = -19.75

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = -19.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| -5(5+3x)=11-6x | | 4x^2+7x-44=0 | | 4-2(2+5v)+7= | | -5p-7=-(3p-3)-4p | | 4y^2-81x^2=-162x+405 | | .2x+2.4-12=0 | | x-7+(-99)=581 | | x-29=83 | | 41(52+13)=x+10-17 | | -5x^3+20x^2+20x+80=0 | | 91n^1+49n=0 | | 63n^2+63n=0 | | 15(x-4)=-6-9 | | -7x+4(3-5)=0 | | 10+x-.33333333x=0 | | 10+x-.33333333=0 | | x^2-15x+10=0 | | 5=2.5-4x | | x^6+8x^3+7=0 | | -1.5x=5 | | (3x+7)*(-8x-7)= | | 2.5-4x=5 | | .4+4x=5 | | 3k+13=19k-8 | | x-9y=19 | | ax-bc=a | | 12+2x-19=x+3 | | 5=0.4-4x | | 5=.5-4x | | 56v^2-23v=63 | | x+2-8=32 | | x+19+2x+27=10 |

Equations solver categories