25x^2-146x-39=0

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Solution for 25x^2-146x-39=0 equation:


Simplifying
25x2 + -146x + -39 = 0

Reorder the terms:
-39 + -146x + 25x2 = 0

Solving
-39 + -146x + 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'.
-1.56 + -5.84x + x2 = 0

Move the constant term to the right:

Add '1.56' to each side of the equation.
-1.56 + -5.84x + 1.56 + x2 = 0 + 1.56

Reorder the terms:
-1.56 + 1.56 + -5.84x + x2 = 0 + 1.56

Combine like terms: -1.56 + 1.56 = 0.00
0.00 + -5.84x + x2 = 0 + 1.56
-5.84x + x2 = 0 + 1.56

Combine like terms: 0 + 1.56 = 1.56
-5.84x + x2 = 1.56

The x term is -5.84x.  Take half its coefficient (-2.92).
Square it (8.5264) and add it to both sides.

Add '8.5264' to each side of the equation.
-5.84x + 8.5264 + x2 = 1.56 + 8.5264

Reorder the terms:
8.5264 + -5.84x + x2 = 1.56 + 8.5264

Combine like terms: 1.56 + 8.5264 = 10.0864
8.5264 + -5.84x + x2 = 10.0864

Factor a perfect square on the left side:
(x + -2.92)(x + -2.92) = 10.0864

Calculate the square root of the right side: 3.175909319

Break this problem into two subproblems by setting 
(x + -2.92) equal to 3.175909319 and -3.175909319.

Subproblem 1

x + -2.92 = 3.175909319 Simplifying x + -2.92 = 3.175909319 Reorder the terms: -2.92 + x = 3.175909319 Solving -2.92 + x = 3.175909319 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.92' to each side of the equation. -2.92 + 2.92 + x = 3.175909319 + 2.92 Combine like terms: -2.92 + 2.92 = 0.00 0.00 + x = 3.175909319 + 2.92 x = 3.175909319 + 2.92 Combine like terms: 3.175909319 + 2.92 = 6.095909319 x = 6.095909319 Simplifying x = 6.095909319

Subproblem 2

x + -2.92 = -3.175909319 Simplifying x + -2.92 = -3.175909319 Reorder the terms: -2.92 + x = -3.175909319 Solving -2.92 + x = -3.175909319 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.92' to each side of the equation. -2.92 + 2.92 + x = -3.175909319 + 2.92 Combine like terms: -2.92 + 2.92 = 0.00 0.00 + x = -3.175909319 + 2.92 x = -3.175909319 + 2.92 Combine like terms: -3.175909319 + 2.92 = -0.255909319 x = -0.255909319 Simplifying x = -0.255909319

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.095909319, -0.255909319}

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