.25x^2-4.5x+11.25=0

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Solution for .25x^2-4.5x+11.25=0 equation:


Simplifying
0.25x2 + -4.5x + 11.25 = 0

Reorder the terms:
11.25 + -4.5x + 0.25x2 = 0

Solving
11.25 + -4.5x + 0.25x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.25'.
45 + -18x + x2 = 0

Move the constant term to the right:

Add '-45' to each side of the equation.
45 + -18x + -45 + x2 = 0 + -45

Reorder the terms:
45 + -45 + -18x + x2 = 0 + -45

Combine like terms: 45 + -45 = 0
0 + -18x + x2 = 0 + -45
-18x + x2 = 0 + -45

Combine like terms: 0 + -45 = -45
-18x + x2 = -45

The x term is -18x.  Take half its coefficient (-9).
Square it (81) and add it to both sides.

Add '81' to each side of the equation.
-18x + 81 + x2 = -45 + 81

Reorder the terms:
81 + -18x + x2 = -45 + 81

Combine like terms: -45 + 81 = 36
81 + -18x + x2 = 36

Factor a perfect square on the left side:
(x + -9)(x + -9) = 36

Calculate the square root of the right side: 6

Break this problem into two subproblems by setting 
(x + -9) equal to 6 and -6.

Subproblem 1

x + -9 = 6 Simplifying x + -9 = 6 Reorder the terms: -9 + x = 6 Solving -9 + x = 6 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + x = 6 + 9 Combine like terms: -9 + 9 = 0 0 + x = 6 + 9 x = 6 + 9 Combine like terms: 6 + 9 = 15 x = 15 Simplifying x = 15

Subproblem 2

x + -9 = -6 Simplifying x + -9 = -6 Reorder the terms: -9 + x = -6 Solving -9 + x = -6 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + x = -6 + 9 Combine like terms: -9 + 9 = 0 0 + x = -6 + 9 x = -6 + 9 Combine like terms: -6 + 9 = 3 x = 3 Simplifying x = 3

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15, 3}

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