2x^2+40.32x-75=0

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Solution for 2x^2+40.32x-75=0 equation:


Simplifying
2x2 + 40.32x + -75 = 0

Reorder the terms:
-75 + 40.32x + 2x2 = 0

Solving
-75 + 40.32x + 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'.
-37.5 + 20.16x + x2 = 0

Move the constant term to the right:

Add '37.5' to each side of the equation.
-37.5 + 20.16x + 37.5 + x2 = 0 + 37.5

Reorder the terms:
-37.5 + 37.5 + 20.16x + x2 = 0 + 37.5

Combine like terms: -37.5 + 37.5 = 0.0
0.0 + 20.16x + x2 = 0 + 37.5
20.16x + x2 = 0 + 37.5

Combine like terms: 0 + 37.5 = 37.5
20.16x + x2 = 37.5

The x term is 20.16x.  Take half its coefficient (10.08).
Square it (101.6064) and add it to both sides.

Add '101.6064' to each side of the equation.
20.16x + 101.6064 + x2 = 37.5 + 101.6064

Reorder the terms:
101.6064 + 20.16x + x2 = 37.5 + 101.6064

Combine like terms: 37.5 + 101.6064 = 139.1064
101.6064 + 20.16x + x2 = 139.1064

Factor a perfect square on the left side:
(x + 10.08)(x + 10.08) = 139.1064

Calculate the square root of the right side: 11.794337624

Break this problem into two subproblems by setting 
(x + 10.08) equal to 11.794337624 and -11.794337624.

Subproblem 1

x + 10.08 = 11.794337624 Simplifying x + 10.08 = 11.794337624 Reorder the terms: 10.08 + x = 11.794337624 Solving 10.08 + x = 11.794337624 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10.08' to each side of the equation. 10.08 + -10.08 + x = 11.794337624 + -10.08 Combine like terms: 10.08 + -10.08 = 0.00 0.00 + x = 11.794337624 + -10.08 x = 11.794337624 + -10.08 Combine like terms: 11.794337624 + -10.08 = 1.714337624 x = 1.714337624 Simplifying x = 1.714337624

Subproblem 2

x + 10.08 = -11.794337624 Simplifying x + 10.08 = -11.794337624 Reorder the terms: 10.08 + x = -11.794337624 Solving 10.08 + x = -11.794337624 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10.08' to each side of the equation. 10.08 + -10.08 + x = -11.794337624 + -10.08 Combine like terms: 10.08 + -10.08 = 0.00 0.00 + x = -11.794337624 + -10.08 x = -11.794337624 + -10.08 Combine like terms: -11.794337624 + -10.08 = -21.874337624 x = -21.874337624 Simplifying x = -21.874337624

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.714337624, -21.874337624}

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