2.5x^2-4.75x+2.2=0

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Solution for 2.5x^2-4.75x+2.2=0 equation:


Simplifying
2.5x2 + -4.75x + 2.2 = 0

Reorder the terms:
2.2 + -4.75x + 2.5x2 = 0

Solving
2.2 + -4.75x + 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'.
0.88 + -1.9x + x2 = 0

Move the constant term to the right:

Add '-0.88' to each side of the equation.
0.88 + -1.9x + -0.88 + x2 = 0 + -0.88

Reorder the terms:
0.88 + -0.88 + -1.9x + x2 = 0 + -0.88

Combine like terms: 0.88 + -0.88 = 0.00
0.00 + -1.9x + x2 = 0 + -0.88
-1.9x + x2 = 0 + -0.88

Combine like terms: 0 + -0.88 = -0.88
-1.9x + x2 = -0.88

The x term is -1.9x.  Take half its coefficient (-0.95).
Square it (0.9025) and add it to both sides.

Add '0.9025' to each side of the equation.
-1.9x + 0.9025 + x2 = -0.88 + 0.9025

Reorder the terms:
0.9025 + -1.9x + x2 = -0.88 + 0.9025

Combine like terms: -0.88 + 0.9025 = 0.0225
0.9025 + -1.9x + x2 = 0.0225

Factor a perfect square on the left side:
(x + -0.95)(x + -0.95) = 0.0225

Calculate the square root of the right side: 0.15

Break this problem into two subproblems by setting 
(x + -0.95) equal to 0.15 and -0.15.

Subproblem 1

x + -0.95 = 0.15 Simplifying x + -0.95 = 0.15 Reorder the terms: -0.95 + x = 0.15 Solving -0.95 + x = 0.15 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.95' to each side of the equation. -0.95 + 0.95 + x = 0.15 + 0.95 Combine like terms: -0.95 + 0.95 = 0.00 0.00 + x = 0.15 + 0.95 x = 0.15 + 0.95 Combine like terms: 0.15 + 0.95 = 1.1 x = 1.1 Simplifying x = 1.1

Subproblem 2

x + -0.95 = -0.15 Simplifying x + -0.95 = -0.15 Reorder the terms: -0.95 + x = -0.15 Solving -0.95 + x = -0.15 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.95' to each side of the equation. -0.95 + 0.95 + x = -0.15 + 0.95 Combine like terms: -0.95 + 0.95 = 0.00 0.00 + x = -0.15 + 0.95 x = -0.15 + 0.95 Combine like terms: -0.15 + 0.95 = 0.8 x = 0.8 Simplifying x = 0.8

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.1, 0.8}

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