25x^2-40x-96=0

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Solution for 25x^2-40x-96=0 equation:


Simplifying
25x2 + -40x + -96 = 0

Reorder the terms:
-96 + -40x + 25x2 = 0

Solving
-96 + -40x + 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'.
-3.84 + -1.6x + x2 = 0

Move the constant term to the right:

Add '3.84' to each side of the equation.
-3.84 + -1.6x + 3.84 + x2 = 0 + 3.84

Reorder the terms:
-3.84 + 3.84 + -1.6x + x2 = 0 + 3.84

Combine like terms: -3.84 + 3.84 = 0.00
0.00 + -1.6x + x2 = 0 + 3.84
-1.6x + x2 = 0 + 3.84

Combine like terms: 0 + 3.84 = 3.84
-1.6x + x2 = 3.84

The x term is -1.6x.  Take half its coefficient (-0.8).
Square it (0.64) and add it to both sides.

Add '0.64' to each side of the equation.
-1.6x + 0.64 + x2 = 3.84 + 0.64

Reorder the terms:
0.64 + -1.6x + x2 = 3.84 + 0.64

Combine like terms: 3.84 + 0.64 = 4.48
0.64 + -1.6x + x2 = 4.48

Factor a perfect square on the left side:
(x + -0.8)(x + -0.8) = 4.48

Calculate the square root of the right side: 2.116601049

Break this problem into two subproblems by setting 
(x + -0.8) equal to 2.116601049 and -2.116601049.

Subproblem 1

x + -0.8 = 2.116601049 Simplifying x + -0.8 = 2.116601049 Reorder the terms: -0.8 + x = 2.116601049 Solving -0.8 + x = 2.116601049 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8' to each side of the equation. -0.8 + 0.8 + x = 2.116601049 + 0.8 Combine like terms: -0.8 + 0.8 = 0.0 0.0 + x = 2.116601049 + 0.8 x = 2.116601049 + 0.8 Combine like terms: 2.116601049 + 0.8 = 2.916601049 x = 2.916601049 Simplifying x = 2.916601049

Subproblem 2

x + -0.8 = -2.116601049 Simplifying x + -0.8 = -2.116601049 Reorder the terms: -0.8 + x = -2.116601049 Solving -0.8 + x = -2.116601049 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8' to each side of the equation. -0.8 + 0.8 + x = -2.116601049 + 0.8 Combine like terms: -0.8 + 0.8 = 0.0 0.0 + x = -2.116601049 + 0.8 x = -2.116601049 + 0.8 Combine like terms: -2.116601049 + 0.8 = -1.316601049 x = -1.316601049 Simplifying x = -1.316601049

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.916601049, -1.316601049}

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