x^2+12x-75=0

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Solution for x^2+12x-75=0 equation:


Simplifying
x2 + 12x + -75 = 0

Reorder the terms:
-75 + 12x + x2 = 0

Solving
-75 + 12x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '75' to each side of the equation.
-75 + 12x + 75 + x2 = 0 + 75

Reorder the terms:
-75 + 75 + 12x + x2 = 0 + 75

Combine like terms: -75 + 75 = 0
0 + 12x + x2 = 0 + 75
12x + x2 = 0 + 75

Combine like terms: 0 + 75 = 75
12x + x2 = 75

The x term is 12x.  Take half its coefficient (6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
12x + 36 + x2 = 75 + 36

Reorder the terms:
36 + 12x + x2 = 75 + 36

Combine like terms: 75 + 36 = 111
36 + 12x + x2 = 111

Factor a perfect square on the left side:
(x + 6)(x + 6) = 111

Calculate the square root of the right side: 10.535653753

Break this problem into two subproblems by setting 
(x + 6) equal to 10.535653753 and -10.535653753.

Subproblem 1

x + 6 = 10.535653753 Simplifying x + 6 = 10.535653753 Reorder the terms: 6 + x = 10.535653753 Solving 6 + x = 10.535653753 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = 10.535653753 + -6 Combine like terms: 6 + -6 = 0 0 + x = 10.535653753 + -6 x = 10.535653753 + -6 Combine like terms: 10.535653753 + -6 = 4.535653753 x = 4.535653753 Simplifying x = 4.535653753

Subproblem 2

x + 6 = -10.535653753 Simplifying x + 6 = -10.535653753 Reorder the terms: 6 + x = -10.535653753 Solving 6 + x = -10.535653753 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = -10.535653753 + -6 Combine like terms: 6 + -6 = 0 0 + x = -10.535653753 + -6 x = -10.535653753 + -6 Combine like terms: -10.535653753 + -6 = -16.535653753 x = -16.535653753 Simplifying x = -16.535653753

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.535653753, -16.535653753}

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