-x^2+2x=5

Simple and best practice solution for -x^2+2x=5 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+2x=5 equation:


Simplifying
-1x2 + 2x = 5

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

Solving
2x + -1x2 = 5

Solving for variable 'x'.

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

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

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
5 + -2x + x2 = 0

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + -2x + -5 + x2 = 0 + -5

Reorder the terms:
5 + -5 + -2x + x2 = 0 + -5

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

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

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = -5 + 1

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

Combine like terms: -5 + 1 = -4
1 + -2x + x2 = -4

Factor a perfect square on the left side:
(x + -1)(x + -1) = -4

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| x+.2x=1500 | | 6r-9=2r+11 | | 3x^4-27x^3-210x^2=0 | | -3x^2-6=x^2-12 | | 5x-8=x-24 | | x=1/3(90-x) | | 1=x-15 | | 5(x+2)=7-3x | | 8y-15=3y+15 | | 14x(8x+4)= | | X^10=4.3 | | 3(2x)-24-4=4x-8 | | 8y-15=4y+15 | | .5n=5p-10n | | 4b^6-12=60 | | 10-2(x-3)=16 | | 4x=8+x+1 | | 1/2y=x-12 | | 2.3x-1.6=8.8-29x | | 42x=83 | | (x+6)+x=16 | | 10x-94=76 | | x+(x-30)=210 | | 8x+47=87 | | 3b^7=30 | | g(x)=0.5x | | p^2+14p+15=0 | | x^2+1x+3=0 | | 4x^4+3x^2+9=0 | | 15x=90+9x | | -4(z+3)+5=5z+11 | | 3=c/d |

Equations solver categories