5x^2-180x+4=0

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Solution for 5x^2-180x+4=0 equation:


Simplifying
5x2 + -180x + 4 = 0

Reorder the terms:
4 + -180x + 5x2 = 0

Solving
4 + -180x + 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'.
0.8 + -36x + x2 = 0

Move the constant term to the right:

Add '-0.8' to each side of the equation.
0.8 + -36x + -0.8 + x2 = 0 + -0.8

Reorder the terms:
0.8 + -0.8 + -36x + x2 = 0 + -0.8

Combine like terms: 0.8 + -0.8 = 0.0
0.0 + -36x + x2 = 0 + -0.8
-36x + x2 = 0 + -0.8

Combine like terms: 0 + -0.8 = -0.8
-36x + x2 = -0.8

The x term is -36x.  Take half its coefficient (-18).
Square it (324) and add it to both sides.

Add '324' to each side of the equation.
-36x + 324 + x2 = -0.8 + 324

Reorder the terms:
324 + -36x + x2 = -0.8 + 324

Combine like terms: -0.8 + 324 = 323.2
324 + -36x + x2 = 323.2

Factor a perfect square on the left side:
(x + -18)(x + -18) = 323.2

Calculate the square root of the right side: 17.977764043

Break this problem into two subproblems by setting 
(x + -18) equal to 17.977764043 and -17.977764043.

Subproblem 1

x + -18 = 17.977764043 Simplifying x + -18 = 17.977764043 Reorder the terms: -18 + x = 17.977764043 Solving -18 + x = 17.977764043 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + x = 17.977764043 + 18 Combine like terms: -18 + 18 = 0 0 + x = 17.977764043 + 18 x = 17.977764043 + 18 Combine like terms: 17.977764043 + 18 = 35.977764043 x = 35.977764043 Simplifying x = 35.977764043

Subproblem 2

x + -18 = -17.977764043 Simplifying x + -18 = -17.977764043 Reorder the terms: -18 + x = -17.977764043 Solving -18 + x = -17.977764043 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + x = -17.977764043 + 18 Combine like terms: -18 + 18 = 0 0 + x = -17.977764043 + 18 x = -17.977764043 + 18 Combine like terms: -17.977764043 + 18 = 0.022235957 x = 0.022235957 Simplifying x = 0.022235957

Solution

The solution to the problem is based on the solutions from the subproblems. x = {35.977764043, 0.022235957}

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