-x^2+2x=7

Simple and best practice solution for -x^2+2x=7 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=7 equation:


Simplifying
-1x2 + 2x = 7

Reorder the terms:
2x + -1x2 = 7

Solving
2x + -1x2 = 7

Solving for variable 'x'.

Reorder the terms:
-7 + 2x + -1x2 = 7 + -7

Combine like terms: 7 + -7 = 0
-7 + 2x + -1x2 = 0

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

Divide each side by '-1'.
7 + -2x + x2 = 0

Move the constant term to the right:

Add '-7' to each side of the equation.
7 + -2x + -7 + x2 = 0 + -7

Reorder the terms:
7 + -7 + -2x + x2 = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -2x + x2 = 0 + -7
-2x + x2 = 0 + -7

Combine like terms: 0 + -7 = -7
-2x + x2 = -7

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 = -7 + 1

Reorder the terms:
1 + -2x + x2 = -7 + 1

Combine like terms: -7 + 1 = -6
1 + -2x + x2 = -6

Factor a perfect square on the left side:
(x + -1)(x + -1) = -6

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| x+4x=18 | | 4x-10+5x-20=180 | | 5k-2k=12 | | 8-2n=n-24 | | x^5=3125 | | (x+2)(x+2)=432 | | 3(x+4)+9=6+3(5+x) | | 7x-26+4x+1=90 | | 3(6x+7)=9(2x+3) | | 15m-11m=12 | | 180n/n=468 | | 7x-26+4x+1=180 | | 5j-2j=15 | | 4(b+7)=-20 | | 10b-2=7b-74 | | 25*8*23=x | | (x-2)+(x+6)=0 | | 8n+3+2n-9=13-5n+11 | | 2c+7c=18 | | x=-55-84 | | c^3+64=0 | | 36x^2-16y^2-576=0 | | 8+y=-10 | | 15x+9+6x=51x | | 5(-7x+2)=3x+10 | | 5+2(n+1)=25 | | lnx^2=-2 | | 4(3s-1)-8s+6=-10 | | 10-6x=124 | | 31.50-4.50=2.25 | | -2b-14=-17 | | a+57=a+x |

Equations solver categories