(x+3)(x)+(x-8)=55

Simple and best practice solution for (x+3)(x)+(x-8)=55 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+3)(x)+(x-8)=55 equation:


Simplifying
(x + 3)(x) + (x + -8) = 55

Reorder the terms:
(3 + x)(x) + (x + -8) = 55

Reorder the terms for easier multiplication:
x(3 + x) + (x + -8) = 55
(3 * x + x * x) + (x + -8) = 55
(3x + x2) + (x + -8) = 55

Reorder the terms:
3x + x2 + (-8 + x) = 55

Remove parenthesis around (-8 + x)
3x + x2 + -8 + x = 55

Reorder the terms:
-8 + 3x + x + x2 = 55

Combine like terms: 3x + x = 4x
-8 + 4x + x2 = 55

Solving
-8 + 4x + x2 = 55

Solving for variable 'x'.

Reorder the terms:
-8 + -55 + 4x + x2 = 55 + -55

Combine like terms: -8 + -55 = -63
-63 + 4x + x2 = 55 + -55

Combine like terms: 55 + -55 = 0
-63 + 4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '63' to each side of the equation.
-63 + 4x + 63 + x2 = 0 + 63

Reorder the terms:
-63 + 63 + 4x + x2 = 0 + 63

Combine like terms: -63 + 63 = 0
0 + 4x + x2 = 0 + 63
4x + x2 = 0 + 63

Combine like terms: 0 + 63 = 63
4x + x2 = 63

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 = 63 + 4

Reorder the terms:
4 + 4x + x2 = 63 + 4

Combine like terms: 63 + 4 = 67
4 + 4x + x2 = 67

Factor a perfect square on the left side:
(x + 2)(x + 2) = 67

Calculate the square root of the right side: 8.185352772

Break this problem into two subproblems by setting 
(x + 2) equal to 8.185352772 and -8.185352772.

Subproblem 1

x + 2 = 8.185352772 Simplifying x + 2 = 8.185352772 Reorder the terms: 2 + x = 8.185352772 Solving 2 + x = 8.185352772 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 8.185352772 + -2 Combine like terms: 2 + -2 = 0 0 + x = 8.185352772 + -2 x = 8.185352772 + -2 Combine like terms: 8.185352772 + -2 = 6.185352772 x = 6.185352772 Simplifying x = 6.185352772

Subproblem 2

x + 2 = -8.185352772 Simplifying x + 2 = -8.185352772 Reorder the terms: 2 + x = -8.185352772 Solving 2 + x = -8.185352772 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -8.185352772 + -2 Combine like terms: 2 + -2 = 0 0 + x = -8.185352772 + -2 x = -8.185352772 + -2 Combine like terms: -8.185352772 + -2 = -10.185352772 x = -10.185352772 Simplifying x = -10.185352772

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.185352772, -10.185352772}

See similar equations:

| 3(x^3)-125=0 | | cos(xy)=3x^1+3y^4 | | 12y=84 | | 0.60x+0.05(10-x)=0.10(38) | | 3.2p+4=2p-8 | | y=(5x^4+7x^1)+(3x^8+3x^6) | | t/5-10=30 | | 24-5x=-9x+4 | | 5-8x=-x-23 | | 5x=0,5 | | -8x=-3x-35 | | 15-3x=5x-1 | | m/(-2)+(-6)=13 | | 7-4g=7 | | 19-x=2x+4 | | 2w-6+5=3w-1 | | .05(c+53)=20 | | x+7*x+7=0 | | 5(x+1)+3=x+12 | | 5-9(2.5)=2(9) | | 9y-5=-17+15y | | .12-x=0 | | 9(2.5)+9=14 | | 4+0.3m=19 | | 9(y)-9=14 | | 3x^2+7-5x^2=4x^2+16 | | -2x-6=-5x+24 | | 15a+a=-16 | | 3(2)+4=10 | | 2a+a=-6 | | 5x+19=54 | | 53+x+2=35 |

Equations solver categories