5x^2-90x+144=0

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Solution for 5x^2-90x+144=0 equation:


Simplifying
5x2 + -90x + 144 = 0

Reorder the terms:
144 + -90x + 5x2 = 0

Solving
144 + -90x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
28.8 + -18x + x2 = 0

Move the constant term to the right:

Add '-28.8' to each side of the equation.
28.8 + -18x + -28.8 + x2 = 0 + -28.8

Reorder the terms:
28.8 + -28.8 + -18x + x2 = 0 + -28.8

Combine like terms: 28.8 + -28.8 = 0.0
0.0 + -18x + x2 = 0 + -28.8
-18x + x2 = 0 + -28.8

Combine like terms: 0 + -28.8 = -28.8
-18x + x2 = -28.8

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 = -28.8 + 81

Reorder the terms:
81 + -18x + x2 = -28.8 + 81

Combine like terms: -28.8 + 81 = 52.2
81 + -18x + x2 = 52.2

Factor a perfect square on the left side:
(x + -9)(x + -9) = 52.2

Calculate the square root of the right side: 7.224956747

Break this problem into two subproblems by setting 
(x + -9) equal to 7.224956747 and -7.224956747.

Subproblem 1

x + -9 = 7.224956747 Simplifying x + -9 = 7.224956747 Reorder the terms: -9 + x = 7.224956747 Solving -9 + x = 7.224956747 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 = 7.224956747 + 9 Combine like terms: -9 + 9 = 0 0 + x = 7.224956747 + 9 x = 7.224956747 + 9 Combine like terms: 7.224956747 + 9 = 16.224956747 x = 16.224956747 Simplifying x = 16.224956747

Subproblem 2

x + -9 = -7.224956747 Simplifying x + -9 = -7.224956747 Reorder the terms: -9 + x = -7.224956747 Solving -9 + x = -7.224956747 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 = -7.224956747 + 9 Combine like terms: -9 + 9 = 0 0 + x = -7.224956747 + 9 x = -7.224956747 + 9 Combine like terms: -7.224956747 + 9 = 1.775043253 x = 1.775043253 Simplifying x = 1.775043253

Solution

The solution to the problem is based on the solutions from the subproblems. x = {16.224956747, 1.775043253}

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