25x^2+30x=-1

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Solution for 25x^2+30x=-1 equation:


Simplifying
25x2 + 30x = -1

Reorder the terms:
30x + 25x2 = -1

Solving
30x + 25x2 = -1

Solving for variable 'x'.

Reorder the terms:
1 + 30x + 25x2 = -1 + 1

Combine like terms: -1 + 1 = 0
1 + 30x + 25x2 = 0

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

Divide each side by '25'.
0.04 + 1.2x + x2 = 0

Move the constant term to the right:

Add '-0.04' to each side of the equation.
0.04 + 1.2x + -0.04 + x2 = 0 + -0.04

Reorder the terms:
0.04 + -0.04 + 1.2x + x2 = 0 + -0.04

Combine like terms: 0.04 + -0.04 = 0.00
0.00 + 1.2x + x2 = 0 + -0.04
1.2x + x2 = 0 + -0.04

Combine like terms: 0 + -0.04 = -0.04
1.2x + x2 = -0.04

The x term is 1.2x.  Take half its coefficient (0.6).
Square it (0.36) and add it to both sides.

Add '0.36' to each side of the equation.
1.2x + 0.36 + x2 = -0.04 + 0.36

Reorder the terms:
0.36 + 1.2x + x2 = -0.04 + 0.36

Combine like terms: -0.04 + 0.36 = 0.32
0.36 + 1.2x + x2 = 0.32

Factor a perfect square on the left side:
(x + 0.6)(x + 0.6) = 0.32

Calculate the square root of the right side: 0.565685425

Break this problem into two subproblems by setting 
(x + 0.6) equal to 0.565685425 and -0.565685425.

Subproblem 1

x + 0.6 = 0.565685425 Simplifying x + 0.6 = 0.565685425 Reorder the terms: 0.6 + x = 0.565685425 Solving 0.6 + x = 0.565685425 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6' to each side of the equation. 0.6 + -0.6 + x = 0.565685425 + -0.6 Combine like terms: 0.6 + -0.6 = 0.0 0.0 + x = 0.565685425 + -0.6 x = 0.565685425 + -0.6 Combine like terms: 0.565685425 + -0.6 = -0.034314575 x = -0.034314575 Simplifying x = -0.034314575

Subproblem 2

x + 0.6 = -0.565685425 Simplifying x + 0.6 = -0.565685425 Reorder the terms: 0.6 + x = -0.565685425 Solving 0.6 + x = -0.565685425 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6' to each side of the equation. 0.6 + -0.6 + x = -0.565685425 + -0.6 Combine like terms: 0.6 + -0.6 = 0.0 0.0 + x = -0.565685425 + -0.6 x = -0.565685425 + -0.6 Combine like terms: -0.565685425 + -0.6 = -1.165685425 x = -1.165685425 Simplifying x = -1.165685425

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.034314575, -1.165685425}

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