25x^2-40x-32=22

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Solution for 25x^2-40x-32=22 equation:


Simplifying
25x2 + -40x + -32 = 22

Reorder the terms:
-32 + -40x + 25x2 = 22

Solving
-32 + -40x + 25x2 = 22

Solving for variable 'x'.

Reorder the terms:
-32 + -22 + -40x + 25x2 = 22 + -22

Combine like terms: -32 + -22 = -54
-54 + -40x + 25x2 = 22 + -22

Combine like terms: 22 + -22 = 0
-54 + -40x + 25x2 = 0

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

Divide each side by '25'.
-2.16 + -1.6x + x2 = 0

Move the constant term to the right:

Add '2.16' to each side of the equation.
-2.16 + -1.6x + 2.16 + x2 = 0 + 2.16

Reorder the terms:
-2.16 + 2.16 + -1.6x + x2 = 0 + 2.16

Combine like terms: -2.16 + 2.16 = 0.00
0.00 + -1.6x + x2 = 0 + 2.16
-1.6x + x2 = 0 + 2.16

Combine like terms: 0 + 2.16 = 2.16
-1.6x + x2 = 2.16

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 = 2.16 + 0.64

Reorder the terms:
0.64 + -1.6x + x2 = 2.16 + 0.64

Combine like terms: 2.16 + 0.64 = 2.8
0.64 + -1.6x + x2 = 2.8

Factor a perfect square on the left side:
(x + -0.8)(x + -0.8) = 2.8

Calculate the square root of the right side: 1.673320053

Break this problem into two subproblems by setting 
(x + -0.8) equal to 1.673320053 and -1.673320053.

Subproblem 1

x + -0.8 = 1.673320053 Simplifying x + -0.8 = 1.673320053 Reorder the terms: -0.8 + x = 1.673320053 Solving -0.8 + x = 1.673320053 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 = 1.673320053 + 0.8 Combine like terms: -0.8 + 0.8 = 0.0 0.0 + x = 1.673320053 + 0.8 x = 1.673320053 + 0.8 Combine like terms: 1.673320053 + 0.8 = 2.473320053 x = 2.473320053 Simplifying x = 2.473320053

Subproblem 2

x + -0.8 = -1.673320053 Simplifying x + -0.8 = -1.673320053 Reorder the terms: -0.8 + x = -1.673320053 Solving -0.8 + x = -1.673320053 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 = -1.673320053 + 0.8 Combine like terms: -0.8 + 0.8 = 0.0 0.0 + x = -1.673320053 + 0.8 x = -1.673320053 + 0.8 Combine like terms: -1.673320053 + 0.8 = -0.873320053 x = -0.873320053 Simplifying x = -0.873320053

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.473320053, -0.873320053}

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