3y^2-33y+70=0

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Solution for 3y^2-33y+70=0 equation:


Simplifying
3y2 + -33y + 70 = 0

Reorder the terms:
70 + -33y + 3y2 = 0

Solving
70 + -33y + 3y2 = 0

Solving for variable 'y'.

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

Divide each side by '3'.
23.33333333 + -11y + y2 = 0

Move the constant term to the right:

Add '-23.33333333' to each side of the equation.
23.33333333 + -11y + -23.33333333 + y2 = 0 + -23.33333333

Reorder the terms:
23.33333333 + -23.33333333 + -11y + y2 = 0 + -23.33333333

Combine like terms: 23.33333333 + -23.33333333 = 0.00000000
0.00000000 + -11y + y2 = 0 + -23.33333333
-11y + y2 = 0 + -23.33333333

Combine like terms: 0 + -23.33333333 = -23.33333333
-11y + y2 = -23.33333333

The y term is -11y.  Take half its coefficient (-5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
-11y + 30.25 + y2 = -23.33333333 + 30.25

Reorder the terms:
30.25 + -11y + y2 = -23.33333333 + 30.25

Combine like terms: -23.33333333 + 30.25 = 6.91666667
30.25 + -11y + y2 = 6.91666667

Factor a perfect square on the left side:
(y + -5.5)(y + -5.5) = 6.91666667

Calculate the square root of the right side: 2.62995564

Break this problem into two subproblems by setting 
(y + -5.5) equal to 2.62995564 and -2.62995564.

Subproblem 1

y + -5.5 = 2.62995564 Simplifying y + -5.5 = 2.62995564 Reorder the terms: -5.5 + y = 2.62995564 Solving -5.5 + y = 2.62995564 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + y = 2.62995564 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + y = 2.62995564 + 5.5 y = 2.62995564 + 5.5 Combine like terms: 2.62995564 + 5.5 = 8.12995564 y = 8.12995564 Simplifying y = 8.12995564

Subproblem 2

y + -5.5 = -2.62995564 Simplifying y + -5.5 = -2.62995564 Reorder the terms: -5.5 + y = -2.62995564 Solving -5.5 + y = -2.62995564 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + y = -2.62995564 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + y = -2.62995564 + 5.5 y = -2.62995564 + 5.5 Combine like terms: -2.62995564 + 5.5 = 2.87004436 y = 2.87004436 Simplifying y = 2.87004436

Solution

The solution to the problem is based on the solutions from the subproblems. y = {8.12995564, 2.87004436}

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