10x^2+25x-88=0

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Solution for 10x^2+25x-88=0 equation:


Simplifying
10x2 + 25x + -88 = 0

Reorder the terms:
-88 + 25x + 10x2 = 0

Solving
-88 + 25x + 10x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
10 the coefficient of the squared term: 

Divide each side by '10'.
-8.8 + 2.5x + x2 = 0

Move the constant term to the right:

Add '8.8' to each side of the equation.
-8.8 + 2.5x + 8.8 + x2 = 0 + 8.8

Reorder the terms:
-8.8 + 8.8 + 2.5x + x2 = 0 + 8.8

Combine like terms: -8.8 + 8.8 = 0.0
0.0 + 2.5x + x2 = 0 + 8.8
2.5x + x2 = 0 + 8.8

Combine like terms: 0 + 8.8 = 8.8
2.5x + x2 = 8.8

The x term is 2.5x.  Take half its coefficient (1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
2.5x + 1.5625 + x2 = 8.8 + 1.5625

Reorder the terms:
1.5625 + 2.5x + x2 = 8.8 + 1.5625

Combine like terms: 8.8 + 1.5625 = 10.3625
1.5625 + 2.5x + x2 = 10.3625

Factor a perfect square on the left side:
(x + 1.25)(x + 1.25) = 10.3625

Calculate the square root of the right side: 3.219083721

Break this problem into two subproblems by setting 
(x + 1.25) equal to 3.219083721 and -3.219083721.

Subproblem 1

x + 1.25 = 3.219083721 Simplifying x + 1.25 = 3.219083721 Reorder the terms: 1.25 + x = 3.219083721 Solving 1.25 + x = 3.219083721 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + x = 3.219083721 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = 3.219083721 + -1.25 x = 3.219083721 + -1.25 Combine like terms: 3.219083721 + -1.25 = 1.969083721 x = 1.969083721 Simplifying x = 1.969083721

Subproblem 2

x + 1.25 = -3.219083721 Simplifying x + 1.25 = -3.219083721 Reorder the terms: 1.25 + x = -3.219083721 Solving 1.25 + x = -3.219083721 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + x = -3.219083721 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = -3.219083721 + -1.25 x = -3.219083721 + -1.25 Combine like terms: -3.219083721 + -1.25 = -4.469083721 x = -4.469083721 Simplifying x = -4.469083721

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.969083721, -4.469083721}

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