2x^2+7x+6=180

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Solution for 2x^2+7x+6=180 equation:


Simplifying
2x2 + 7x + 6 = 180

Reorder the terms:
6 + 7x + 2x2 = 180

Solving
6 + 7x + 2x2 = 180

Solving for variable 'x'.

Reorder the terms:
6 + -180 + 7x + 2x2 = 180 + -180

Combine like terms: 6 + -180 = -174
-174 + 7x + 2x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-174 + 7x + 2x2 = 0

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
-87 + 3.5x + x2 = 0

Move the constant term to the right:

Add '87' to each side of the equation.
-87 + 3.5x + 87 + x2 = 0 + 87

Reorder the terms:
-87 + 87 + 3.5x + x2 = 0 + 87

Combine like terms: -87 + 87 = 0
0 + 3.5x + x2 = 0 + 87
3.5x + x2 = 0 + 87

Combine like terms: 0 + 87 = 87
3.5x + x2 = 87

The x term is 3.5x.  Take half its coefficient (1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
3.5x + 3.0625 + x2 = 87 + 3.0625

Reorder the terms:
3.0625 + 3.5x + x2 = 87 + 3.0625

Combine like terms: 87 + 3.0625 = 90.0625
3.0625 + 3.5x + x2 = 90.0625

Factor a perfect square on the left side:
(x + 1.75)(x + 1.75) = 90.0625

Calculate the square root of the right side: 9.490126448

Break this problem into two subproblems by setting 
(x + 1.75) equal to 9.490126448 and -9.490126448.

Subproblem 1

x + 1.75 = 9.490126448 Simplifying x + 1.75 = 9.490126448 Reorder the terms: 1.75 + x = 9.490126448 Solving 1.75 + x = 9.490126448 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + x = 9.490126448 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + x = 9.490126448 + -1.75 x = 9.490126448 + -1.75 Combine like terms: 9.490126448 + -1.75 = 7.740126448 x = 7.740126448 Simplifying x = 7.740126448

Subproblem 2

x + 1.75 = -9.490126448 Simplifying x + 1.75 = -9.490126448 Reorder the terms: 1.75 + x = -9.490126448 Solving 1.75 + x = -9.490126448 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + x = -9.490126448 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + x = -9.490126448 + -1.75 x = -9.490126448 + -1.75 Combine like terms: -9.490126448 + -1.75 = -11.240126448 x = -11.240126448 Simplifying x = -11.240126448

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.740126448, -11.240126448}

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