2.5x^2-3.2x+1=0

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Solution for 2.5x^2-3.2x+1=0 equation:


Simplifying
2.5x2 + -3.2x + 1 = 0

Reorder the terms:
1 + -3.2x + 2.5x2 = 0

Solving
1 + -3.2x + 2.5x2 = 0

Solving for variable 'x'.

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

Divide each side by '2.5'.
0.4 + -1.28x + x2 = 0

Move the constant term to the right:

Add '-0.4' to each side of the equation.
0.4 + -1.28x + -0.4 + x2 = 0 + -0.4

Reorder the terms:
0.4 + -0.4 + -1.28x + x2 = 0 + -0.4

Combine like terms: 0.4 + -0.4 = 0.0
0.0 + -1.28x + x2 = 0 + -0.4
-1.28x + x2 = 0 + -0.4

Combine like terms: 0 + -0.4 = -0.4
-1.28x + x2 = -0.4

The x term is -1.28x.  Take half its coefficient (-0.64).
Square it (0.4096) and add it to both sides.

Add '0.4096' to each side of the equation.
-1.28x + 0.4096 + x2 = -0.4 + 0.4096

Reorder the terms:
0.4096 + -1.28x + x2 = -0.4 + 0.4096

Combine like terms: -0.4 + 0.4096 = 0.0096
0.4096 + -1.28x + x2 = 0.0096

Factor a perfect square on the left side:
(x + -0.64)(x + -0.64) = 0.0096

Calculate the square root of the right side: 0.09797959

Break this problem into two subproblems by setting 
(x + -0.64) equal to 0.09797959 and -0.09797959.

Subproblem 1

x + -0.64 = 0.09797959 Simplifying x + -0.64 = 0.09797959 Reorder the terms: -0.64 + x = 0.09797959 Solving -0.64 + x = 0.09797959 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.64' to each side of the equation. -0.64 + 0.64 + x = 0.09797959 + 0.64 Combine like terms: -0.64 + 0.64 = 0.00 0.00 + x = 0.09797959 + 0.64 x = 0.09797959 + 0.64 Combine like terms: 0.09797959 + 0.64 = 0.73797959 x = 0.73797959 Simplifying x = 0.73797959

Subproblem 2

x + -0.64 = -0.09797959 Simplifying x + -0.64 = -0.09797959 Reorder the terms: -0.64 + x = -0.09797959 Solving -0.64 + x = -0.09797959 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.64' to each side of the equation. -0.64 + 0.64 + x = -0.09797959 + 0.64 Combine like terms: -0.64 + 0.64 = 0.00 0.00 + x = -0.09797959 + 0.64 x = -0.09797959 + 0.64 Combine like terms: -0.09797959 + 0.64 = 0.54202041 x = 0.54202041 Simplifying x = 0.54202041

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.73797959, 0.54202041}

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