2x^2+9x-750=0

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Solution for 2x^2+9x-750=0 equation:


Simplifying
2x2 + 9x + -750 = 0

Reorder the terms:
-750 + 9x + 2x2 = 0

Solving
-750 + 9x + 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'.
-375 + 4.5x + x2 = 0

Move the constant term to the right:

Add '375' to each side of the equation.
-375 + 4.5x + 375 + x2 = 0 + 375

Reorder the terms:
-375 + 375 + 4.5x + x2 = 0 + 375

Combine like terms: -375 + 375 = 0
0 + 4.5x + x2 = 0 + 375
4.5x + x2 = 0 + 375

Combine like terms: 0 + 375 = 375
4.5x + x2 = 375

The x term is 4.5x.  Take half its coefficient (2.25).
Square it (5.0625) and add it to both sides.

Add '5.0625' to each side of the equation.
4.5x + 5.0625 + x2 = 375 + 5.0625

Reorder the terms:
5.0625 + 4.5x + x2 = 375 + 5.0625

Combine like terms: 375 + 5.0625 = 380.0625
5.0625 + 4.5x + x2 = 380.0625

Factor a perfect square on the left side:
(x + 2.25)(x + 2.25) = 380.0625

Calculate the square root of the right side: 19.495191715

Break this problem into two subproblems by setting 
(x + 2.25) equal to 19.495191715 and -19.495191715.

Subproblem 1

x + 2.25 = 19.495191715 Simplifying x + 2.25 = 19.495191715 Reorder the terms: 2.25 + x = 19.495191715 Solving 2.25 + x = 19.495191715 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.25' to each side of the equation. 2.25 + -2.25 + x = 19.495191715 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + x = 19.495191715 + -2.25 x = 19.495191715 + -2.25 Combine like terms: 19.495191715 + -2.25 = 17.245191715 x = 17.245191715 Simplifying x = 17.245191715

Subproblem 2

x + 2.25 = -19.495191715 Simplifying x + 2.25 = -19.495191715 Reorder the terms: 2.25 + x = -19.495191715 Solving 2.25 + x = -19.495191715 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.25' to each side of the equation. 2.25 + -2.25 + x = -19.495191715 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + x = -19.495191715 + -2.25 x = -19.495191715 + -2.25 Combine like terms: -19.495191715 + -2.25 = -21.745191715 x = -21.745191715 Simplifying x = -21.745191715

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.245191715, -21.745191715}

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