x*x-7=2(x+x-7)

Simple and best practice solution for x*x-7=2(x+x-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*x-7=2(x+x-7) equation:


Simplifying
x * x + -7 = 2(x + x + -7)

Multiply x * x
x2 + -7 = 2(x + x + -7)

Reorder the terms:
-7 + x2 = 2(x + x + -7)

Reorder the terms:
-7 + x2 = 2(-7 + x + x)

Combine like terms: x + x = 2x
-7 + x2 = 2(-7 + 2x)
-7 + x2 = (-7 * 2 + 2x * 2)
-7 + x2 = (-14 + 4x)

Solving
-7 + x2 = -14 + 4x

Solving for variable 'x'.

Reorder the terms:
-7 + 14 + -4x + x2 = -14 + 4x + 14 + -4x

Combine like terms: -7 + 14 = 7
7 + -4x + x2 = -14 + 4x + 14 + -4x

Reorder the terms:
7 + -4x + x2 = -14 + 14 + 4x + -4x

Combine like terms: -14 + 14 = 0
7 + -4x + x2 = 0 + 4x + -4x
7 + -4x + x2 = 4x + -4x

Combine like terms: 4x + -4x = 0
7 + -4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-7' to each side of the equation.
7 + -4x + -7 + x2 = 0 + -7

Reorder the terms:
7 + -7 + -4x + x2 = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -4x + x2 = 0 + -7
-4x + x2 = 0 + -7

Combine like terms: 0 + -7 = -7
-4x + x2 = -7

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x + 4 + x2 = -7 + 4

Reorder the terms:
4 + -4x + x2 = -7 + 4

Combine like terms: -7 + 4 = -3
4 + -4x + x2 = -3

Factor a perfect square on the left side:
(x + -2)(x + -2) = -3

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 6x+26=3x+101 | | 13s=2s-56 | | 6x-3+5x=12 | | x*(x-7)=2(x+x-7) | | (r^4)+64=0 | | 10n-2=-8+9n | | 3y+1=2 | | (36x^2)+24x=0 | | y+16=3y-34 | | 3x-13=7x+11 | | -7x+3=13x-37 | | 6x=y+3 | | 8v-8=3v | | x+1=3(2x+8) | | 2(3x-2)=2(17x+18) | | 3u-8=31 | | 3u-8=11 | | 25=2v+11 | | W+11w+9w-18w-4w-3=2 | | =2d+3.2 | | -4x+6.9=-25.1 | | 3x^3-27y=0 | | -6j+15j-15j+5j=-11 | | .66(5x+7)=21 | | 0=3x^2+30x+117 | | 10s-7s-s+1=17 | | (5x+7)=21 | | (k+1)(k+8)=0 | | x^2+5x+12=162 | | 0=2(1+x) | | 20v+5v-21v+1=9 | | 2x-2y=4yforx |

Equations solver categories