2x^2+45x-550=0

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Solution for 2x^2+45x-550=0 equation:


Simplifying
2x2 + 45x + -550 = 0

Reorder the terms:
-550 + 45x + 2x2 = 0

Solving
-550 + 45x + 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'.
-275 + 22.5x + x2 = 0

Move the constant term to the right:

Add '275' to each side of the equation.
-275 + 22.5x + 275 + x2 = 0 + 275

Reorder the terms:
-275 + 275 + 22.5x + x2 = 0 + 275

Combine like terms: -275 + 275 = 0
0 + 22.5x + x2 = 0 + 275
22.5x + x2 = 0 + 275

Combine like terms: 0 + 275 = 275
22.5x + x2 = 275

The x term is 22.5x.  Take half its coefficient (11.25).
Square it (126.5625) and add it to both sides.

Add '126.5625' to each side of the equation.
22.5x + 126.5625 + x2 = 275 + 126.5625

Reorder the terms:
126.5625 + 22.5x + x2 = 275 + 126.5625

Combine like terms: 275 + 126.5625 = 401.5625
126.5625 + 22.5x + x2 = 401.5625

Factor a perfect square on the left side:
(x + 11.25)(x + 11.25) = 401.5625

Calculate the square root of the right side: 20.039024427

Break this problem into two subproblems by setting 
(x + 11.25) equal to 20.039024427 and -20.039024427.

Subproblem 1

x + 11.25 = 20.039024427 Simplifying x + 11.25 = 20.039024427 Reorder the terms: 11.25 + x = 20.039024427 Solving 11.25 + x = 20.039024427 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11.25' to each side of the equation. 11.25 + -11.25 + x = 20.039024427 + -11.25 Combine like terms: 11.25 + -11.25 = 0.00 0.00 + x = 20.039024427 + -11.25 x = 20.039024427 + -11.25 Combine like terms: 20.039024427 + -11.25 = 8.789024427 x = 8.789024427 Simplifying x = 8.789024427

Subproblem 2

x + 11.25 = -20.039024427 Simplifying x + 11.25 = -20.039024427 Reorder the terms: 11.25 + x = -20.039024427 Solving 11.25 + x = -20.039024427 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11.25' to each side of the equation. 11.25 + -11.25 + x = -20.039024427 + -11.25 Combine like terms: 11.25 + -11.25 = 0.00 0.00 + x = -20.039024427 + -11.25 x = -20.039024427 + -11.25 Combine like terms: -20.039024427 + -11.25 = -31.289024427 x = -31.289024427 Simplifying x = -31.289024427

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.789024427, -31.289024427}

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