25x^2-15x-64=5x-10

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Solution for 25x^2-15x-64=5x-10 equation:


Simplifying
25x2 + -15x + -64 = 5x + -10

Reorder the terms:
-64 + -15x + 25x2 = 5x + -10

Reorder the terms:
-64 + -15x + 25x2 = -10 + 5x

Solving
-64 + -15x + 25x2 = -10 + 5x

Solving for variable 'x'.

Reorder the terms:
-64 + 10 + -15x + -5x + 25x2 = -10 + 5x + 10 + -5x

Combine like terms: -64 + 10 = -54
-54 + -15x + -5x + 25x2 = -10 + 5x + 10 + -5x

Combine like terms: -15x + -5x = -20x
-54 + -20x + 25x2 = -10 + 5x + 10 + -5x

Reorder the terms:
-54 + -20x + 25x2 = -10 + 10 + 5x + -5x

Combine like terms: -10 + 10 = 0
-54 + -20x + 25x2 = 0 + 5x + -5x
-54 + -20x + 25x2 = 5x + -5x

Combine like terms: 5x + -5x = 0
-54 + -20x + 25x2 = 0

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

Divide each side by '25'.
-2.16 + -0.8x + x2 = 0

Move the constant term to the right:

Add '2.16' to each side of the equation.
-2.16 + -0.8x + 2.16 + x2 = 0 + 2.16

Reorder the terms:
-2.16 + 2.16 + -0.8x + x2 = 0 + 2.16

Combine like terms: -2.16 + 2.16 = 0.00
0.00 + -0.8x + x2 = 0 + 2.16
-0.8x + x2 = 0 + 2.16

Combine like terms: 0 + 2.16 = 2.16
-0.8x + x2 = 2.16

The x term is -0.8x.  Take half its coefficient (-0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
-0.8x + 0.16 + x2 = 2.16 + 0.16

Reorder the terms:
0.16 + -0.8x + x2 = 2.16 + 0.16

Combine like terms: 2.16 + 0.16 = 2.32
0.16 + -0.8x + x2 = 2.32

Factor a perfect square on the left side:
(x + -0.4)(x + -0.4) = 2.32

Calculate the square root of the right side: 1.523154621

Break this problem into two subproblems by setting 
(x + -0.4) equal to 1.523154621 and -1.523154621.

Subproblem 1

x + -0.4 = 1.523154621 Simplifying x + -0.4 = 1.523154621 Reorder the terms: -0.4 + x = 1.523154621 Solving -0.4 + x = 1.523154621 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + x = 1.523154621 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + x = 1.523154621 + 0.4 x = 1.523154621 + 0.4 Combine like terms: 1.523154621 + 0.4 = 1.923154621 x = 1.923154621 Simplifying x = 1.923154621

Subproblem 2

x + -0.4 = -1.523154621 Simplifying x + -0.4 = -1.523154621 Reorder the terms: -0.4 + x = -1.523154621 Solving -0.4 + x = -1.523154621 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + x = -1.523154621 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + x = -1.523154621 + 0.4 x = -1.523154621 + 0.4 Combine like terms: -1.523154621 + 0.4 = -1.123154621 x = -1.123154621 Simplifying x = -1.123154621

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.923154621, -1.123154621}

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