25x^2+x-12=0

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Solution for 25x^2+x-12=0 equation:


Simplifying
25x2 + x + -12 = 0

Reorder the terms:
-12 + x + 25x2 = 0

Solving
-12 + x + 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'.
-0.48 + 0.04x + x2 = 0

Move the constant term to the right:

Add '0.48' to each side of the equation.
-0.48 + 0.04x + 0.48 + x2 = 0 + 0.48

Reorder the terms:
-0.48 + 0.48 + 0.04x + x2 = 0 + 0.48

Combine like terms: -0.48 + 0.48 = 0.00
0.00 + 0.04x + x2 = 0 + 0.48
0.04x + x2 = 0 + 0.48

Combine like terms: 0 + 0.48 = 0.48
0.04x + x2 = 0.48

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.04x + 0.25 + x2 = 0.48 + 0.25

Reorder the terms:
0.25 + 0.04x + x2 = 0.48 + 0.25

Combine like terms: 0.48 + 0.25 = 0.73
0.25 + 0.04x + x2 = 0.73

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 0.73

Calculate the square root of the right side: 0.854400375

Break this problem into two subproblems by setting 
(x + 0.5) equal to 0.854400375 and -0.854400375.

Subproblem 1

x + 0.5 = 0.854400375 Simplifying x + 0.5 = 0.854400375 Reorder the terms: 0.5 + x = 0.854400375 Solving 0.5 + x = 0.854400375 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 0.854400375 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 0.854400375 + -0.5 x = 0.854400375 + -0.5 Combine like terms: 0.854400375 + -0.5 = 0.354400375 x = 0.354400375 Simplifying x = 0.354400375

Subproblem 2

x + 0.5 = -0.854400375 Simplifying x + 0.5 = -0.854400375 Reorder the terms: 0.5 + x = -0.854400375 Solving 0.5 + x = -0.854400375 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -0.854400375 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -0.854400375 + -0.5 x = -0.854400375 + -0.5 Combine like terms: -0.854400375 + -0.5 = -1.354400375 x = -1.354400375 Simplifying x = -1.354400375

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.354400375, -1.354400375}

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