0=3x^2-90x+500

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Solution for 0=3x^2-90x+500 equation:


Simplifying
0 = 3x2 + -90x + 500

Reorder the terms:
0 = 500 + -90x + 3x2

Solving
0 = 500 + -90x + 3x2

Solving for variable 'x'.

Combine like terms: 0 + -500 = -500
-500 + 90x + -3x2 = 500 + -90x + 3x2 + -500 + 90x + -3x2

Reorder the terms:
-500 + 90x + -3x2 = 500 + -500 + -90x + 90x + 3x2 + -3x2

Combine like terms: 500 + -500 = 0
-500 + 90x + -3x2 = 0 + -90x + 90x + 3x2 + -3x2
-500 + 90x + -3x2 = -90x + 90x + 3x2 + -3x2

Combine like terms: -90x + 90x = 0
-500 + 90x + -3x2 = 0 + 3x2 + -3x2
-500 + 90x + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
-500 + 90x + -3x2 = 0

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
166.6666667 + -30x + x2 = 0

Move the constant term to the right:

Add '-166.6666667' to each side of the equation.
166.6666667 + -30x + -166.6666667 + x2 = 0 + -166.6666667

Reorder the terms:
166.6666667 + -166.6666667 + -30x + x2 = 0 + -166.6666667

Combine like terms: 166.6666667 + -166.6666667 = 0.0000000
0.0000000 + -30x + x2 = 0 + -166.6666667
-30x + x2 = 0 + -166.6666667

Combine like terms: 0 + -166.6666667 = -166.6666667
-30x + x2 = -166.6666667

The x term is -30x.  Take half its coefficient (-15).
Square it (225) and add it to both sides.

Add '225' to each side of the equation.
-30x + 225 + x2 = -166.6666667 + 225

Reorder the terms:
225 + -30x + x2 = -166.6666667 + 225

Combine like terms: -166.6666667 + 225 = 58.3333333
225 + -30x + x2 = 58.3333333

Factor a perfect square on the left side:
(x + -15)(x + -15) = 58.3333333

Calculate the square root of the right side: 7.637626156

Break this problem into two subproblems by setting 
(x + -15) equal to 7.637626156 and -7.637626156.

Subproblem 1

x + -15 = 7.637626156 Simplifying x + -15 = 7.637626156 Reorder the terms: -15 + x = 7.637626156 Solving -15 + x = 7.637626156 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + x = 7.637626156 + 15 Combine like terms: -15 + 15 = 0 0 + x = 7.637626156 + 15 x = 7.637626156 + 15 Combine like terms: 7.637626156 + 15 = 22.637626156 x = 22.637626156 Simplifying x = 22.637626156

Subproblem 2

x + -15 = -7.637626156 Simplifying x + -15 = -7.637626156 Reorder the terms: -15 + x = -7.637626156 Solving -15 + x = -7.637626156 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + x = -7.637626156 + 15 Combine like terms: -15 + 15 = 0 0 + x = -7.637626156 + 15 x = -7.637626156 + 15 Combine like terms: -7.637626156 + 15 = 7.362373844 x = 7.362373844 Simplifying x = 7.362373844

Solution

The solution to the problem is based on the solutions from the subproblems. x = {22.637626156, 7.362373844}

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