-3y^2-4y=-3

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Solution for -3y^2-4y=-3 equation:


Simplifying
-3y2 + -4y = -3

Reorder the terms:
-4y + -3y2 = -3

Solving
-4y + -3y2 = -3

Solving for variable 'y'.

Reorder the terms:
3 + -4y + -3y2 = -3 + 3

Combine like terms: -3 + 3 = 0
3 + -4y + -3y2 = 0

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

Divide each side by '-3'.
-1 + 1.333333333y + y2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + 1.333333333y + 1 + y2 = 0 + 1

Reorder the terms:
-1 + 1 + 1.333333333y + y2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 1.333333333y + y2 = 0 + 1
1.333333333y + y2 = 0 + 1

Combine like terms: 0 + 1 = 1
1.333333333y + y2 = 1

The y term is 1.333333333y.  Take half its coefficient (0.6666666665).
Square it (0.4444444442) and add it to both sides.

Add '0.4444444442' to each side of the equation.
1.333333333y + 0.4444444442 + y2 = 1 + 0.4444444442

Reorder the terms:
0.4444444442 + 1.333333333y + y2 = 1 + 0.4444444442

Combine like terms: 1 + 0.4444444442 = 1.4444444442
0.4444444442 + 1.333333333y + y2 = 1.4444444442

Factor a perfect square on the left side:
(y + 0.6666666665)(y + 0.6666666665) = 1.4444444442

Calculate the square root of the right side: 1.201850425

Break this problem into two subproblems by setting 
(y + 0.6666666665) equal to 1.201850425 and -1.201850425.

Subproblem 1

y + 0.6666666665 = 1.201850425 Simplifying y + 0.6666666665 = 1.201850425 Reorder the terms: 0.6666666665 + y = 1.201850425 Solving 0.6666666665 + y = 1.201850425 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.6666666665' to each side of the equation. 0.6666666665 + -0.6666666665 + y = 1.201850425 + -0.6666666665 Combine like terms: 0.6666666665 + -0.6666666665 = 0.0000000000 0.0000000000 + y = 1.201850425 + -0.6666666665 y = 1.201850425 + -0.6666666665 Combine like terms: 1.201850425 + -0.6666666665 = 0.5351837585 y = 0.5351837585 Simplifying y = 0.5351837585

Subproblem 2

y + 0.6666666665 = -1.201850425 Simplifying y + 0.6666666665 = -1.201850425 Reorder the terms: 0.6666666665 + y = -1.201850425 Solving 0.6666666665 + y = -1.201850425 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.6666666665' to each side of the equation. 0.6666666665 + -0.6666666665 + y = -1.201850425 + -0.6666666665 Combine like terms: 0.6666666665 + -0.6666666665 = 0.0000000000 0.0000000000 + y = -1.201850425 + -0.6666666665 y = -1.201850425 + -0.6666666665 Combine like terms: -1.201850425 + -0.6666666665 = -1.8685170915 y = -1.8685170915 Simplifying y = -1.8685170915

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.5351837585, -1.8685170915}

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