25x^2+15x-33=0

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Solution for 25x^2+15x-33=0 equation:


Simplifying
25x2 + 15x + -33 = 0

Reorder the terms:
-33 + 15x + 25x2 = 0

Solving
-33 + 15x + 25x2 = 0

Solving for variable 'x'.

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

Divide each side by '25'.
-1.32 + 0.6x + x2 = 0

Move the constant term to the right:

Add '1.32' to each side of the equation.
-1.32 + 0.6x + 1.32 + x2 = 0 + 1.32

Reorder the terms:
-1.32 + 1.32 + 0.6x + x2 = 0 + 1.32

Combine like terms: -1.32 + 1.32 = 0.00
0.00 + 0.6x + x2 = 0 + 1.32
0.6x + x2 = 0 + 1.32

Combine like terms: 0 + 1.32 = 1.32
0.6x + x2 = 1.32

The x term is 0.6x.  Take half its coefficient (0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
0.6x + 0.09 + x2 = 1.32 + 0.09

Reorder the terms:
0.09 + 0.6x + x2 = 1.32 + 0.09

Combine like terms: 1.32 + 0.09 = 1.41
0.09 + 0.6x + x2 = 1.41

Factor a perfect square on the left side:
(x + 0.3)(x + 0.3) = 1.41

Calculate the square root of the right side: 1.187434209

Break this problem into two subproblems by setting 
(x + 0.3) equal to 1.187434209 and -1.187434209.

Subproblem 1

x + 0.3 = 1.187434209 Simplifying x + 0.3 = 1.187434209 Reorder the terms: 0.3 + x = 1.187434209 Solving 0.3 + x = 1.187434209 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + x = 1.187434209 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + x = 1.187434209 + -0.3 x = 1.187434209 + -0.3 Combine like terms: 1.187434209 + -0.3 = 0.887434209 x = 0.887434209 Simplifying x = 0.887434209

Subproblem 2

x + 0.3 = -1.187434209 Simplifying x + 0.3 = -1.187434209 Reorder the terms: 0.3 + x = -1.187434209 Solving 0.3 + x = -1.187434209 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + x = -1.187434209 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + x = -1.187434209 + -0.3 x = -1.187434209 + -0.3 Combine like terms: -1.187434209 + -0.3 = -1.487434209 x = -1.487434209 Simplifying x = -1.487434209

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.887434209, -1.487434209}

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