10y^2-11y=3

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Solution for 10y^2-11y=3 equation:


Simplifying
10y2 + -11y = 3

Reorder the terms:
-11y + 10y2 = 3

Solving
-11y + 10y2 = 3

Solving for variable 'y'.

Reorder the terms:
-3 + -11y + 10y2 = 3 + -3

Combine like terms: 3 + -3 = 0
-3 + -11y + 10y2 = 0

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

Divide each side by '10'.
-0.3 + -1.1y + y2 = 0

Move the constant term to the right:

Add '0.3' to each side of the equation.
-0.3 + -1.1y + 0.3 + y2 = 0 + 0.3

Reorder the terms:
-0.3 + 0.3 + -1.1y + y2 = 0 + 0.3

Combine like terms: -0.3 + 0.3 = 0.0
0.0 + -1.1y + y2 = 0 + 0.3
-1.1y + y2 = 0 + 0.3

Combine like terms: 0 + 0.3 = 0.3
-1.1y + y2 = 0.3

The y term is -1.1y.  Take half its coefficient (-0.55).
Square it (0.3025) and add it to both sides.

Add '0.3025' to each side of the equation.
-1.1y + 0.3025 + y2 = 0.3 + 0.3025

Reorder the terms:
0.3025 + -1.1y + y2 = 0.3 + 0.3025

Combine like terms: 0.3 + 0.3025 = 0.6025
0.3025 + -1.1y + y2 = 0.6025

Factor a perfect square on the left side:
(y + -0.55)(y + -0.55) = 0.6025

Calculate the square root of the right side: 0.776208735

Break this problem into two subproblems by setting 
(y + -0.55) equal to 0.776208735 and -0.776208735.

Subproblem 1

y + -0.55 = 0.776208735 Simplifying y + -0.55 = 0.776208735 Reorder the terms: -0.55 + y = 0.776208735 Solving -0.55 + y = 0.776208735 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.55' to each side of the equation. -0.55 + 0.55 + y = 0.776208735 + 0.55 Combine like terms: -0.55 + 0.55 = 0.00 0.00 + y = 0.776208735 + 0.55 y = 0.776208735 + 0.55 Combine like terms: 0.776208735 + 0.55 = 1.326208735 y = 1.326208735 Simplifying y = 1.326208735

Subproblem 2

y + -0.55 = -0.776208735 Simplifying y + -0.55 = -0.776208735 Reorder the terms: -0.55 + y = -0.776208735 Solving -0.55 + y = -0.776208735 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.55' to each side of the equation. -0.55 + 0.55 + y = -0.776208735 + 0.55 Combine like terms: -0.55 + 0.55 = 0.00 0.00 + y = -0.776208735 + 0.55 y = -0.776208735 + 0.55 Combine like terms: -0.776208735 + 0.55 = -0.226208735 y = -0.226208735 Simplifying y = -0.226208735

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.326208735, -0.226208735}

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