2x^2-45x-252=0

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Solution for 2x^2-45x-252=0 equation:


Simplifying
2x2 + -45x + -252 = 0

Reorder the terms:
-252 + -45x + 2x2 = 0

Solving
-252 + -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'.
-126 + -22.5x + x2 = 0

Move the constant term to the right:

Add '126' to each side of the equation.
-126 + -22.5x + 126 + x2 = 0 + 126

Reorder the terms:
-126 + 126 + -22.5x + x2 = 0 + 126

Combine like terms: -126 + 126 = 0
0 + -22.5x + x2 = 0 + 126
-22.5x + x2 = 0 + 126

Combine like terms: 0 + 126 = 126
-22.5x + x2 = 126

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 = 126 + 126.5625

Reorder the terms:
126.5625 + -22.5x + x2 = 126 + 126.5625

Combine like terms: 126 + 126.5625 = 252.5625
126.5625 + -22.5x + x2 = 252.5625

Factor a perfect square on the left side:
(x + -11.25)(x + -11.25) = 252.5625

Calculate the square root of the right side: 15.892215075

Break this problem into two subproblems by setting 
(x + -11.25) equal to 15.892215075 and -15.892215075.

Subproblem 1

x + -11.25 = 15.892215075 Simplifying x + -11.25 = 15.892215075 Reorder the terms: -11.25 + x = 15.892215075 Solving -11.25 + x = 15.892215075 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 = 15.892215075 + 11.25 Combine like terms: -11.25 + 11.25 = 0.00 0.00 + x = 15.892215075 + 11.25 x = 15.892215075 + 11.25 Combine like terms: 15.892215075 + 11.25 = 27.142215075 x = 27.142215075 Simplifying x = 27.142215075

Subproblem 2

x + -11.25 = -15.892215075 Simplifying x + -11.25 = -15.892215075 Reorder the terms: -11.25 + x = -15.892215075 Solving -11.25 + x = -15.892215075 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 = -15.892215075 + 11.25 Combine like terms: -11.25 + 11.25 = 0.00 0.00 + x = -15.892215075 + 11.25 x = -15.892215075 + 11.25 Combine like terms: -15.892215075 + 11.25 = -4.642215075 x = -4.642215075 Simplifying x = -4.642215075

Solution

The solution to the problem is based on the solutions from the subproblems. x = {27.142215075, -4.642215075}

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