5x^2+25x-3=0

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Solution for 5x^2+25x-3=0 equation:


Simplifying
5x2 + 25x + -3 = 0

Reorder the terms:
-3 + 25x + 5x2 = 0

Solving
-3 + 25x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-0.6 + 5x + x2 = 0

Move the constant term to the right:

Add '0.6' to each side of the equation.
-0.6 + 5x + 0.6 + x2 = 0 + 0.6

Reorder the terms:
-0.6 + 0.6 + 5x + x2 = 0 + 0.6

Combine like terms: -0.6 + 0.6 = 0.0
0.0 + 5x + x2 = 0 + 0.6
5x + x2 = 0 + 0.6

Combine like terms: 0 + 0.6 = 0.6
5x + x2 = 0.6

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = 0.6 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 0.6 + 6.25

Combine like terms: 0.6 + 6.25 = 6.85
6.25 + 5x + x2 = 6.85

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 6.85

Calculate the square root of the right side: 2.617250466

Break this problem into two subproblems by setting 
(x + 2.5) equal to 2.617250466 and -2.617250466.

Subproblem 1

x + 2.5 = 2.617250466 Simplifying x + 2.5 = 2.617250466 Reorder the terms: 2.5 + x = 2.617250466 Solving 2.5 + x = 2.617250466 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 2.617250466 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 2.617250466 + -2.5 x = 2.617250466 + -2.5 Combine like terms: 2.617250466 + -2.5 = 0.117250466 x = 0.117250466 Simplifying x = 0.117250466

Subproblem 2

x + 2.5 = -2.617250466 Simplifying x + 2.5 = -2.617250466 Reorder the terms: 2.5 + x = -2.617250466 Solving 2.5 + x = -2.617250466 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -2.617250466 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -2.617250466 + -2.5 x = -2.617250466 + -2.5 Combine like terms: -2.617250466 + -2.5 = -5.117250466 x = -5.117250466 Simplifying x = -5.117250466

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.117250466, -5.117250466}

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