5y-2y^2+3-4y^2=

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Solution for 5y-2y^2+3-4y^2= equation:


Simplifying
5y + -2y2 + 3 + -4y2 = 0

Reorder the terms:
3 + 5y + -2y2 + -4y2 = 0

Combine like terms: -2y2 + -4y2 = -6y2
3 + 5y + -6y2 = 0

Solving
3 + 5y + -6y2 = 0

Solving for variable 'y'.

Begin completing the square.  Divide all terms by
-6 the coefficient of the squared term: 

Divide each side by '-6'.
-0.5 + -0.8333333333y + y2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -0.8333333333y + 0.5 + y2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -0.8333333333y + y2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -0.8333333333y + y2 = 0 + 0.5
-0.8333333333y + y2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-0.8333333333y + y2 = 0.5

The y term is -0.8333333333y.  Take half its coefficient (-0.4166666667).
Square it (0.1736111111) and add it to both sides.

Add '0.1736111111' to each side of the equation.
-0.8333333333y + 0.1736111111 + y2 = 0.5 + 0.1736111111

Reorder the terms:
0.1736111111 + -0.8333333333y + y2 = 0.5 + 0.1736111111

Combine like terms: 0.5 + 0.1736111111 = 0.6736111111
0.1736111111 + -0.8333333333y + y2 = 0.6736111111

Factor a perfect square on the left side:
(y + -0.4166666667)(y + -0.4166666667) = 0.6736111111

Calculate the square root of the right side: 0.82073815

Break this problem into two subproblems by setting 
(y + -0.4166666667) equal to 0.82073815 and -0.82073815.

Subproblem 1

y + -0.4166666667 = 0.82073815 Simplifying y + -0.4166666667 = 0.82073815 Reorder the terms: -0.4166666667 + y = 0.82073815 Solving -0.4166666667 + y = 0.82073815 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.4166666667' to each side of the equation. -0.4166666667 + 0.4166666667 + y = 0.82073815 + 0.4166666667 Combine like terms: -0.4166666667 + 0.4166666667 = 0.0000000000 0.0000000000 + y = 0.82073815 + 0.4166666667 y = 0.82073815 + 0.4166666667 Combine like terms: 0.82073815 + 0.4166666667 = 1.2374048167 y = 1.2374048167 Simplifying y = 1.2374048167

Subproblem 2

y + -0.4166666667 = -0.82073815 Simplifying y + -0.4166666667 = -0.82073815 Reorder the terms: -0.4166666667 + y = -0.82073815 Solving -0.4166666667 + y = -0.82073815 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.4166666667' to each side of the equation. -0.4166666667 + 0.4166666667 + y = -0.82073815 + 0.4166666667 Combine like terms: -0.4166666667 + 0.4166666667 = 0.0000000000 0.0000000000 + y = -0.82073815 + 0.4166666667 y = -0.82073815 + 0.4166666667 Combine like terms: -0.82073815 + 0.4166666667 = -0.4040714833 y = -0.4040714833 Simplifying y = -0.4040714833

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.2374048167, -0.4040714833}

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