(4x^2)-30x+45=0

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Solution for (4x^2)-30x+45=0 equation:


Simplifying
(4x2) + -30x + 45 = 0

Reorder the terms:
45 + -30x + (4x2) = 0

Solving
45 + -30x + (4x2) = 0

Solving for variable 'x'.

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

Divide each side by '4'.
11.25 + -7.5x + x2 = 0

Move the constant term to the right:

Add '-11.25' to each side of the equation.
11.25 + -7.5x + -11.25 + x2 = 0 + -11.25

Reorder the terms:
11.25 + -11.25 + -7.5x + x2 = 0 + -11.25

Combine like terms: 11.25 + -11.25 = 0.00
0.00 + -7.5x + x2 = 0 + -11.25
-7.5x + x2 = 0 + -11.25

Combine like terms: 0 + -11.25 = -11.25
-7.5x + x2 = -11.25

The x term is -7.5x.  Take half its coefficient (-3.75).
Square it (14.0625) and add it to both sides.

Add '14.0625' to each side of the equation.
-7.5x + 14.0625 + x2 = -11.25 + 14.0625

Reorder the terms:
14.0625 + -7.5x + x2 = -11.25 + 14.0625

Combine like terms: -11.25 + 14.0625 = 2.8125
14.0625 + -7.5x + x2 = 2.8125

Factor a perfect square on the left side:
((x) + -3.75)((x) + -3.75) = 2.8125

Calculate the square root of the right side: 1.677050983

Break this problem into two subproblems by setting 
((x) + -3.75) equal to 1.677050983 and -1.677050983.

Subproblem 1

(x) + -3.75 = 1.677050983 Simplifying (x) + -3.75 = 1.677050983 x + -3.75 = 1.677050983 Reorder the terms: -3.75 + x = 1.677050983 Solving -3.75 + x = 1.677050983 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.75' to each side of the equation. -3.75 + 3.75 + x = 1.677050983 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + x = 1.677050983 + 3.75 x = 1.677050983 + 3.75 Combine like terms: 1.677050983 + 3.75 = 5.427050983 x = 5.427050983 Simplifying x = 5.427050983

Subproblem 2

(x) + -3.75 = -1.677050983 Simplifying (x) + -3.75 = -1.677050983 x + -3.75 = -1.677050983 Reorder the terms: -3.75 + x = -1.677050983 Solving -3.75 + x = -1.677050983 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.75' to each side of the equation. -3.75 + 3.75 + x = -1.677050983 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + x = -1.677050983 + 3.75 x = -1.677050983 + 3.75 Combine like terms: -1.677050983 + 3.75 = 2.072949017 x = 2.072949017 Simplifying x = 2.072949017

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.427050983, 2.072949017}

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