x^2-7x-12=180

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Solution for x^2-7x-12=180 equation:


Simplifying
x2 + -7x + -12 = 180

Reorder the terms:
-12 + -7x + x2 = 180

Solving
-12 + -7x + x2 = 180

Solving for variable 'x'.

Reorder the terms:
-12 + -180 + -7x + x2 = 180 + -180

Combine like terms: -12 + -180 = -192
-192 + -7x + x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-192 + -7x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '192' to each side of the equation.
-192 + -7x + 192 + x2 = 0 + 192

Reorder the terms:
-192 + 192 + -7x + x2 = 0 + 192

Combine like terms: -192 + 192 = 0
0 + -7x + x2 = 0 + 192
-7x + x2 = 0 + 192

Combine like terms: 0 + 192 = 192
-7x + x2 = 192

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 = 192 + 12.25

Reorder the terms:
12.25 + -7x + x2 = 192 + 12.25

Combine like terms: 192 + 12.25 = 204.25
12.25 + -7x + x2 = 204.25

Factor a perfect square on the left side:
(x + -3.5)(x + -3.5) = 204.25

Calculate the square root of the right side: 14.291605928

Break this problem into two subproblems by setting 
(x + -3.5) equal to 14.291605928 and -14.291605928.

Subproblem 1

x + -3.5 = 14.291605928 Simplifying x + -3.5 = 14.291605928 Reorder the terms: -3.5 + x = 14.291605928 Solving -3.5 + x = 14.291605928 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 = 14.291605928 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = 14.291605928 + 3.5 x = 14.291605928 + 3.5 Combine like terms: 14.291605928 + 3.5 = 17.791605928 x = 17.791605928 Simplifying x = 17.791605928

Subproblem 2

x + -3.5 = -14.291605928 Simplifying x + -3.5 = -14.291605928 Reorder the terms: -3.5 + x = -14.291605928 Solving -3.5 + x = -14.291605928 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 = -14.291605928 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = -14.291605928 + 3.5 x = -14.291605928 + 3.5 Combine like terms: -14.291605928 + 3.5 = -10.791605928 x = -10.791605928 Simplifying x = -10.791605928

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.791605928, -10.791605928}

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