2x^2+45x+200=0

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Solution for 2x^2+45x+200=0 equation:


Simplifying
2x2 + 45x + 200 = 0

Reorder the terms:
200 + 45x + 2x2 = 0

Solving
200 + 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'.
100 + 22.5x + x2 = 0

Move the constant term to the right:

Add '-100' to each side of the equation.
100 + 22.5x + -100 + x2 = 0 + -100

Reorder the terms:
100 + -100 + 22.5x + x2 = 0 + -100

Combine like terms: 100 + -100 = 0
0 + 22.5x + x2 = 0 + -100
22.5x + x2 = 0 + -100

Combine like terms: 0 + -100 = -100
22.5x + x2 = -100

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 = -100 + 126.5625

Reorder the terms:
126.5625 + 22.5x + x2 = -100 + 126.5625

Combine like terms: -100 + 126.5625 = 26.5625
126.5625 + 22.5x + x2 = 26.5625

Factor a perfect square on the left side:
(x + 11.25)(x + 11.25) = 26.5625

Calculate the square root of the right side: 5.153882032

Break this problem into two subproblems by setting 
(x + 11.25) equal to 5.153882032 and -5.153882032.

Subproblem 1

x + 11.25 = 5.153882032 Simplifying x + 11.25 = 5.153882032 Reorder the terms: 11.25 + x = 5.153882032 Solving 11.25 + x = 5.153882032 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 = 5.153882032 + -11.25 Combine like terms: 11.25 + -11.25 = 0.00 0.00 + x = 5.153882032 + -11.25 x = 5.153882032 + -11.25 Combine like terms: 5.153882032 + -11.25 = -6.096117968 x = -6.096117968 Simplifying x = -6.096117968

Subproblem 2

x + 11.25 = -5.153882032 Simplifying x + 11.25 = -5.153882032 Reorder the terms: 11.25 + x = -5.153882032 Solving 11.25 + x = -5.153882032 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 = -5.153882032 + -11.25 Combine like terms: 11.25 + -11.25 = 0.00 0.00 + x = -5.153882032 + -11.25 x = -5.153882032 + -11.25 Combine like terms: -5.153882032 + -11.25 = -16.403882032 x = -16.403882032 Simplifying x = -16.403882032

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-6.096117968, -16.403882032}

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