25x^2-30x-0.6=0

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Solution for 25x^2-30x-0.6=0 equation:


Simplifying
25x2 + -30x + -0.6 = 0

Reorder the terms:
-0.6 + -30x + 25x2 = 0

Solving
-0.6 + -30x + 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'.
-0.024 + -1.2x + x2 = 0

Move the constant term to the right:

Add '0.024' to each side of the equation.
-0.024 + -1.2x + 0.024 + x2 = 0 + 0.024

Reorder the terms:
-0.024 + 0.024 + -1.2x + x2 = 0 + 0.024

Combine like terms: -0.024 + 0.024 = 0.000
0.000 + -1.2x + x2 = 0 + 0.024
-1.2x + x2 = 0 + 0.024

Combine like terms: 0 + 0.024 = 0.024
-1.2x + x2 = 0.024

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 = 0.024 + 0.36

Reorder the terms:
0.36 + -1.2x + x2 = 0.024 + 0.36

Combine like terms: 0.024 + 0.36 = 0.384
0.36 + -1.2x + x2 = 0.384

Factor a perfect square on the left side:
(x + -0.6)(x + -0.6) = 0.384

Calculate the square root of the right side: 0.619677335

Break this problem into two subproblems by setting 
(x + -0.6) equal to 0.619677335 and -0.619677335.

Subproblem 1

x + -0.6 = 0.619677335 Simplifying x + -0.6 = 0.619677335 Reorder the terms: -0.6 + x = 0.619677335 Solving -0.6 + x = 0.619677335 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 = 0.619677335 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + x = 0.619677335 + 0.6 x = 0.619677335 + 0.6 Combine like terms: 0.619677335 + 0.6 = 1.219677335 x = 1.219677335 Simplifying x = 1.219677335

Subproblem 2

x + -0.6 = -0.619677335 Simplifying x + -0.6 = -0.619677335 Reorder the terms: -0.6 + x = -0.619677335 Solving -0.6 + x = -0.619677335 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 = -0.619677335 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + x = -0.619677335 + 0.6 x = -0.619677335 + 0.6 Combine like terms: -0.619677335 + 0.6 = -0.019677335 x = -0.019677335 Simplifying x = -0.019677335

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.219677335, -0.019677335}

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