-2x^2-11x+60=0

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Solution for -2x^2-11x+60=0 equation:


Simplifying
-2x2 + -11x + 60 = 0

Reorder the terms:
60 + -11x + -2x2 = 0

Solving
60 + -11x + -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'.
-30 + 5.5x + x2 = 0

Move the constant term to the right:

Add '30' to each side of the equation.
-30 + 5.5x + 30 + x2 = 0 + 30

Reorder the terms:
-30 + 30 + 5.5x + x2 = 0 + 30

Combine like terms: -30 + 30 = 0
0 + 5.5x + x2 = 0 + 30
5.5x + x2 = 0 + 30

Combine like terms: 0 + 30 = 30
5.5x + x2 = 30

The x term is 5.5x.  Take half its coefficient (2.75).
Square it (7.5625) and add it to both sides.

Add '7.5625' to each side of the equation.
5.5x + 7.5625 + x2 = 30 + 7.5625

Reorder the terms:
7.5625 + 5.5x + x2 = 30 + 7.5625

Combine like terms: 30 + 7.5625 = 37.5625
7.5625 + 5.5x + x2 = 37.5625

Factor a perfect square on the left side:
(x + 2.75)(x + 2.75) = 37.5625

Calculate the square root of the right side: 6.128825336

Break this problem into two subproblems by setting 
(x + 2.75) equal to 6.128825336 and -6.128825336.

Subproblem 1

x + 2.75 = 6.128825336 Simplifying x + 2.75 = 6.128825336 Reorder the terms: 2.75 + x = 6.128825336 Solving 2.75 + x = 6.128825336 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.75' to each side of the equation. 2.75 + -2.75 + x = 6.128825336 + -2.75 Combine like terms: 2.75 + -2.75 = 0.00 0.00 + x = 6.128825336 + -2.75 x = 6.128825336 + -2.75 Combine like terms: 6.128825336 + -2.75 = 3.378825336 x = 3.378825336 Simplifying x = 3.378825336

Subproblem 2

x + 2.75 = -6.128825336 Simplifying x + 2.75 = -6.128825336 Reorder the terms: 2.75 + x = -6.128825336 Solving 2.75 + x = -6.128825336 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.75' to each side of the equation. 2.75 + -2.75 + x = -6.128825336 + -2.75 Combine like terms: 2.75 + -2.75 = 0.00 0.00 + x = -6.128825336 + -2.75 x = -6.128825336 + -2.75 Combine like terms: -6.128825336 + -2.75 = -8.878825336 x = -8.878825336 Simplifying x = -8.878825336

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.378825336, -8.878825336}

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