x^2+300x-12.6=0

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Solution for x^2+300x-12.6=0 equation:


Simplifying
x2 + 300x + -12.6 = 0

Reorder the terms:
-12.6 + 300x + x2 = 0

Solving
-12.6 + 300x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '12.6' to each side of the equation.
-12.6 + 300x + 12.6 + x2 = 0 + 12.6

Reorder the terms:
-12.6 + 12.6 + 300x + x2 = 0 + 12.6

Combine like terms: -12.6 + 12.6 = 0.0
0.0 + 300x + x2 = 0 + 12.6
300x + x2 = 0 + 12.6

Combine like terms: 0 + 12.6 = 12.6
300x + x2 = 12.6

The x term is 300x.  Take half its coefficient (150).
Square it (22500) and add it to both sides.

Add '22500' to each side of the equation.
300x + 22500 + x2 = 12.6 + 22500

Reorder the terms:
22500 + 300x + x2 = 12.6 + 22500

Combine like terms: 12.6 + 22500 = 22512.6
22500 + 300x + x2 = 22512.6

Factor a perfect square on the left side:
(x + 150)(x + 150) = 22512.6

Calculate the square root of the right side: 150.041994122

Break this problem into two subproblems by setting 
(x + 150) equal to 150.041994122 and -150.041994122.

Subproblem 1

x + 150 = 150.041994122 Simplifying x + 150 = 150.041994122 Reorder the terms: 150 + x = 150.041994122 Solving 150 + x = 150.041994122 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-150' to each side of the equation. 150 + -150 + x = 150.041994122 + -150 Combine like terms: 150 + -150 = 0 0 + x = 150.041994122 + -150 x = 150.041994122 + -150 Combine like terms: 150.041994122 + -150 = 0.041994122 x = 0.041994122 Simplifying x = 0.041994122

Subproblem 2

x + 150 = -150.041994122 Simplifying x + 150 = -150.041994122 Reorder the terms: 150 + x = -150.041994122 Solving 150 + x = -150.041994122 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-150' to each side of the equation. 150 + -150 + x = -150.041994122 + -150 Combine like terms: 150 + -150 = 0 0 + x = -150.041994122 + -150 x = -150.041994122 + -150 Combine like terms: -150.041994122 + -150 = -300.041994122 x = -300.041994122 Simplifying x = -300.041994122

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.041994122, -300.041994122}

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