x^2+2x+x+70=180

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Solution for x^2+2x+x+70=180 equation:


Simplifying
x2 + 2x + x + 70 = 180

Reorder the terms:
70 + 2x + x + x2 = 180

Combine like terms: 2x + x = 3x
70 + 3x + x2 = 180

Solving
70 + 3x + x2 = 180

Solving for variable 'x'.

Reorder the terms:
70 + -180 + 3x + x2 = 180 + -180

Combine like terms: 70 + -180 = -110
-110 + 3x + x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-110 + 3x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '110' to each side of the equation.
-110 + 3x + 110 + x2 = 0 + 110

Reorder the terms:
-110 + 110 + 3x + x2 = 0 + 110

Combine like terms: -110 + 110 = 0
0 + 3x + x2 = 0 + 110
3x + x2 = 0 + 110

Combine like terms: 0 + 110 = 110
3x + x2 = 110

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = 110 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 110 + 2.25

Combine like terms: 110 + 2.25 = 112.25
2.25 + 3x + x2 = 112.25

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 112.25

Calculate the square root of the right side: 10.59481005

Break this problem into two subproblems by setting 
(x + 1.5) equal to 10.59481005 and -10.59481005.

Subproblem 1

x + 1.5 = 10.59481005 Simplifying x + 1.5 = 10.59481005 Reorder the terms: 1.5 + x = 10.59481005 Solving 1.5 + x = 10.59481005 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 10.59481005 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 10.59481005 + -1.5 x = 10.59481005 + -1.5 Combine like terms: 10.59481005 + -1.5 = 9.09481005 x = 9.09481005 Simplifying x = 9.09481005

Subproblem 2

x + 1.5 = -10.59481005 Simplifying x + 1.5 = -10.59481005 Reorder the terms: 1.5 + x = -10.59481005 Solving 1.5 + x = -10.59481005 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -10.59481005 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -10.59481005 + -1.5 x = -10.59481005 + -1.5 Combine like terms: -10.59481005 + -1.5 = -12.09481005 x = -12.09481005 Simplifying x = -12.09481005

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.09481005, -12.09481005}

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