5r^2-33r+50=0

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Solution for 5r^2-33r+50=0 equation:


Simplifying
5r2 + -33r + 50 = 0

Reorder the terms:
50 + -33r + 5r2 = 0

Solving
50 + -33r + 5r2 = 0

Solving for variable 'r'.

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

Divide each side by '5'.
10 + -6.6r + r2 = 0

Move the constant term to the right:

Add '-10' to each side of the equation.
10 + -6.6r + -10 + r2 = 0 + -10

Reorder the terms:
10 + -10 + -6.6r + r2 = 0 + -10

Combine like terms: 10 + -10 = 0
0 + -6.6r + r2 = 0 + -10
-6.6r + r2 = 0 + -10

Combine like terms: 0 + -10 = -10
-6.6r + r2 = -10

The r term is -6.6r.  Take half its coefficient (-3.3).
Square it (10.89) and add it to both sides.

Add '10.89' to each side of the equation.
-6.6r + 10.89 + r2 = -10 + 10.89

Reorder the terms:
10.89 + -6.6r + r2 = -10 + 10.89

Combine like terms: -10 + 10.89 = 0.89
10.89 + -6.6r + r2 = 0.89

Factor a perfect square on the left side:
(r + -3.3)(r + -3.3) = 0.89

Calculate the square root of the right side: 0.943398113

Break this problem into two subproblems by setting 
(r + -3.3) equal to 0.943398113 and -0.943398113.

Subproblem 1

r + -3.3 = 0.943398113 Simplifying r + -3.3 = 0.943398113 Reorder the terms: -3.3 + r = 0.943398113 Solving -3.3 + r = 0.943398113 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '3.3' to each side of the equation. -3.3 + 3.3 + r = 0.943398113 + 3.3 Combine like terms: -3.3 + 3.3 = 0.0 0.0 + r = 0.943398113 + 3.3 r = 0.943398113 + 3.3 Combine like terms: 0.943398113 + 3.3 = 4.243398113 r = 4.243398113 Simplifying r = 4.243398113

Subproblem 2

r + -3.3 = -0.943398113 Simplifying r + -3.3 = -0.943398113 Reorder the terms: -3.3 + r = -0.943398113 Solving -3.3 + r = -0.943398113 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '3.3' to each side of the equation. -3.3 + 3.3 + r = -0.943398113 + 3.3 Combine like terms: -3.3 + 3.3 = 0.0 0.0 + r = -0.943398113 + 3.3 r = -0.943398113 + 3.3 Combine like terms: -0.943398113 + 3.3 = 2.356601887 r = 2.356601887 Simplifying r = 2.356601887

Solution

The solution to the problem is based on the solutions from the subproblems. r = {4.243398113, 2.356601887}

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