2x^2+15x-150=0

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Solution for 2x^2+15x-150=0 equation:


Simplifying
2x2 + 15x + -150 = 0

Reorder the terms:
-150 + 15x + 2x2 = 0

Solving
-150 + 15x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-75 + 7.5x + x2 = 0

Move the constant term to the right:

Add '75' to each side of the equation.
-75 + 7.5x + 75 + x2 = 0 + 75

Reorder the terms:
-75 + 75 + 7.5x + x2 = 0 + 75

Combine like terms: -75 + 75 = 0
0 + 7.5x + x2 = 0 + 75
7.5x + x2 = 0 + 75

Combine like terms: 0 + 75 = 75
7.5x + x2 = 75

The x term is 7.5x.  Take half its coefficient (3.75).
Square it (14.0625) and add it to both sides.

Add '14.0625' to each side of the equation.
7.5x + 14.0625 + x2 = 75 + 14.0625

Reorder the terms:
14.0625 + 7.5x + x2 = 75 + 14.0625

Combine like terms: 75 + 14.0625 = 89.0625
14.0625 + 7.5x + x2 = 89.0625

Factor a perfect square on the left side:
(x + 3.75)(x + 3.75) = 89.0625

Calculate the square root of the right side: 9.437293044

Break this problem into two subproblems by setting 
(x + 3.75) equal to 9.437293044 and -9.437293044.

Subproblem 1

x + 3.75 = 9.437293044 Simplifying x + 3.75 = 9.437293044 Reorder the terms: 3.75 + x = 9.437293044 Solving 3.75 + x = 9.437293044 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.75' to each side of the equation. 3.75 + -3.75 + x = 9.437293044 + -3.75 Combine like terms: 3.75 + -3.75 = 0.00 0.00 + x = 9.437293044 + -3.75 x = 9.437293044 + -3.75 Combine like terms: 9.437293044 + -3.75 = 5.687293044 x = 5.687293044 Simplifying x = 5.687293044

Subproblem 2

x + 3.75 = -9.437293044 Simplifying x + 3.75 = -9.437293044 Reorder the terms: 3.75 + x = -9.437293044 Solving 3.75 + x = -9.437293044 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.75' to each side of the equation. 3.75 + -3.75 + x = -9.437293044 + -3.75 Combine like terms: 3.75 + -3.75 = 0.00 0.00 + x = -9.437293044 + -3.75 x = -9.437293044 + -3.75 Combine like terms: -9.437293044 + -3.75 = -13.187293044 x = -13.187293044 Simplifying x = -13.187293044

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.687293044, -13.187293044}

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