x^2+(x+7)=65

Simple and best practice solution for x^2+(x+7)=65 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+7)=65 equation:


Simplifying
x2 + (x + 7) = 65

Reorder the terms:
x2 + (7 + x) = 65

Remove parenthesis around (7 + x)
x2 + 7 + x = 65

Reorder the terms:
7 + x + x2 = 65

Solving
7 + x + x2 = 65

Solving for variable 'x'.

Reorder the terms:
7 + -65 + x + x2 = 65 + -65

Combine like terms: 7 + -65 = -58
-58 + x + x2 = 65 + -65

Combine like terms: 65 + -65 = 0
-58 + x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '58' to each side of the equation.
-58 + x + 58 + x2 = 0 + 58

Reorder the terms:
-58 + 58 + x + x2 = 0 + 58

Combine like terms: -58 + 58 = 0
0 + x + x2 = 0 + 58
x + x2 = 0 + 58

Combine like terms: 0 + 58 = 58
x + x2 = 58

The x term is x.  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.
x + 0.25 + x2 = 58 + 0.25

Reorder the terms:
0.25 + x + x2 = 58 + 0.25

Combine like terms: 58 + 0.25 = 58.25
0.25 + x + x2 = 58.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 58.25

Calculate the square root of the right side: 7.632168761

Break this problem into two subproblems by setting 
(x + 0.5) equal to 7.632168761 and -7.632168761.

Subproblem 1

x + 0.5 = 7.632168761 Simplifying x + 0.5 = 7.632168761 Reorder the terms: 0.5 + x = 7.632168761 Solving 0.5 + x = 7.632168761 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 7.632168761 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 7.632168761 + -0.5 x = 7.632168761 + -0.5 Combine like terms: 7.632168761 + -0.5 = 7.132168761 x = 7.132168761 Simplifying x = 7.132168761

Subproblem 2

x + 0.5 = -7.632168761 Simplifying x + 0.5 = -7.632168761 Reorder the terms: 0.5 + x = -7.632168761 Solving 0.5 + x = -7.632168761 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -7.632168761 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -7.632168761 + -0.5 x = -7.632168761 + -0.5 Combine like terms: -7.632168761 + -0.5 = -8.132168761 x = -8.132168761 Simplifying x = -8.132168761

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.132168761, -8.132168761}

See similar equations:

| 14=8+3x | | 5x-2-2x=3(x-2) | | 1-2a=-(-4+3a) | | 20=3x+5 | | a-8=-3 | | -3(5s-5)-15=-3(9s+4)-4 | | z-9=-24 | | -8(3d-3)=192 | | 14.6+x=20 | | 4x-1=5x+6 | | 5n+35=40 | | 13.5=a-2 | | 7z=16-44 | | [5-x]-4=2 | | 6x+6=2x+10 | | V^2+3v-4=0 | | -7m-5=3-6m | | |5t|+2=3t+18 | | |2b+4|-3=6b+1 | | |4y-5|+4=7y+8 | | 4031=0.002x-0.10 | | |d-3|=2d+9 | | |3t+6|+9=30 | | p=4m+4u | | r=5h+5v | | 3|2d-7|+1=35 | | 10X-2+62+y=180 | | .5x=3+.167x | | y=-2x^2+4 | | 5x-3-8x=7 | | 3|a-5|-4=14 | | 2x^2-8x-64=0 |

Equations solver categories