x^2+11=7x

Simple and best practice solution for x^2+11=7x 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+11=7x equation:


Simplifying
x2 + 11 = 7x

Reorder the terms:
11 + x2 = 7x

Solving
11 + x2 = 7x

Solving for variable 'x'.

Reorder the terms:
11 + -7x + x2 = 7x + -7x

Combine like terms: 7x + -7x = 0
11 + -7x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-11' to each side of the equation.
11 + -7x + -11 + x2 = 0 + -11

Reorder the terms:
11 + -11 + -7x + x2 = 0 + -11

Combine like terms: 11 + -11 = 0
0 + -7x + x2 = 0 + -11
-7x + x2 = 0 + -11

Combine like terms: 0 + -11 = -11
-7x + x2 = -11

The x term is -7x.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7x + 12.25 + x2 = -11 + 12.25

Reorder the terms:
12.25 + -7x + x2 = -11 + 12.25

Combine like terms: -11 + 12.25 = 1.25
12.25 + -7x + x2 = 1.25

Factor a perfect square on the left side:
(x + -3.5)(x + -3.5) = 1.25

Calculate the square root of the right side: 1.118033989

Break this problem into two subproblems by setting 
(x + -3.5) equal to 1.118033989 and -1.118033989.

Subproblem 1

x + -3.5 = 1.118033989 Simplifying x + -3.5 = 1.118033989 Reorder the terms: -3.5 + x = 1.118033989 Solving -3.5 + x = 1.118033989 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = 1.118033989 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = 1.118033989 + 3.5 x = 1.118033989 + 3.5 Combine like terms: 1.118033989 + 3.5 = 4.618033989 x = 4.618033989 Simplifying x = 4.618033989

Subproblem 2

x + -3.5 = -1.118033989 Simplifying x + -3.5 = -1.118033989 Reorder the terms: -3.5 + x = -1.118033989 Solving -3.5 + x = -1.118033989 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = -1.118033989 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = -1.118033989 + 3.5 x = -1.118033989 + 3.5 Combine like terms: -1.118033989 + 3.5 = 2.381966011 x = 2.381966011 Simplifying x = 2.381966011

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.618033989, 2.381966011}

See similar equations:

| 12(m-1)=14m+2 | | 13x-4= | | 3x-5y=35 | | x^2+6x-31=0 | | .6x-.2y=5.8 | | 4x^2-4x-8= | | x^2+6x=31 | | .1x+.9y=-3.7 | | 28n^2-7=1 | | y^3-2y=y^2 | | 28n^2-7=0 | | ln(x+1)-ln(x-2)=1 | | 2X-48=3X | | p-2+1-p+1-2p= | | 6.99*1000= | | 3*-8.66+-.66y+2y=-26 | | 5-2(x-4)=3(x-62)-1 | | 6y(2v+3)= | | 2y-7=8y+3 | | 5000=699+n | | 3w+1=2w+8 | | 5.00+2.36-0.15=m | | x+x+10=200 | | x+40-x+10=200 | | 9x-5.38=-2.86 | | 7n+3.95=12.63 | | 24x=2700 | | y^2=24 | | 4n+25=75 | | 3*5+3y=-26 | | x+40=200 | | 4n+8=-12 |

Equations solver categories