8x^2+24x-25=0

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Solution for 8x^2+24x-25=0 equation:


Simplifying
8x2 + 24x + -25 = 0

Reorder the terms:
-25 + 24x + 8x2 = 0

Solving
-25 + 24x + 8x2 = 0

Solving for variable 'x'.

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

Divide each side by '8'.
-3.125 + 3x + x2 = 0

Move the constant term to the right:

Add '3.125' to each side of the equation.
-3.125 + 3x + 3.125 + x2 = 0 + 3.125

Reorder the terms:
-3.125 + 3.125 + 3x + x2 = 0 + 3.125

Combine like terms: -3.125 + 3.125 = 0.000
0.000 + 3x + x2 = 0 + 3.125
3x + x2 = 0 + 3.125

Combine like terms: 0 + 3.125 = 3.125
3x + x2 = 3.125

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = 3.125 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 3.125 + 2.25

Combine like terms: 3.125 + 2.25 = 5.375
2.25 + 3x + x2 = 5.375

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 5.375

Calculate the square root of the right side: 2.318404624

Break this problem into two subproblems by setting 
(x + 1.5) equal to 2.318404624 and -2.318404624.

Subproblem 1

x + 1.5 = 2.318404624 Simplifying x + 1.5 = 2.318404624 Reorder the terms: 1.5 + x = 2.318404624 Solving 1.5 + x = 2.318404624 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 2.318404624 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 2.318404624 + -1.5 x = 2.318404624 + -1.5 Combine like terms: 2.318404624 + -1.5 = 0.818404624 x = 0.818404624 Simplifying x = 0.818404624

Subproblem 2

x + 1.5 = -2.318404624 Simplifying x + 1.5 = -2.318404624 Reorder the terms: 1.5 + x = -2.318404624 Solving 1.5 + x = -2.318404624 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -2.318404624 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -2.318404624 + -1.5 x = -2.318404624 + -1.5 Combine like terms: -2.318404624 + -1.5 = -3.818404624 x = -3.818404624 Simplifying x = -3.818404624

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.818404624, -3.818404624}

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