(6y^2+3)+(4y^2-7y-5)=

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Solution for (6y^2+3)+(4y^2-7y-5)= equation:


Simplifying
(6y2 + 3) + (4y2 + -7y + -5) = 0

Reorder the terms:
(3 + 6y2) + (4y2 + -7y + -5) = 0

Remove parenthesis around (3 + 6y2)
3 + 6y2 + (4y2 + -7y + -5) = 0

Reorder the terms:
3 + 6y2 + (-5 + -7y + 4y2) = 0

Remove parenthesis around (-5 + -7y + 4y2)
3 + 6y2 + -5 + -7y + 4y2 = 0

Reorder the terms:
3 + -5 + -7y + 6y2 + 4y2 = 0

Combine like terms: 3 + -5 = -2
-2 + -7y + 6y2 + 4y2 = 0

Combine like terms: 6y2 + 4y2 = 10y2
-2 + -7y + 10y2 = 0

Solving
-2 + -7y + 10y2 = 0

Solving for variable 'y'.

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

Divide each side by '10'.
-0.2 + -0.7y + y2 = 0.0

Move the constant term to the right:

Add '0.2' to each side of the equation.
-0.2 + -0.7y + 0.2 + y2 = 0.0 + 0.2

Reorder the terms:
-0.2 + 0.2 + -0.7y + y2 = 0.0 + 0.2

Combine like terms: -0.2 + 0.2 = 0.0
0.0 + -0.7y + y2 = 0.0 + 0.2
-0.7y + y2 = 0.0 + 0.2

Combine like terms: 0.0 + 0.2 = 0.2
-0.7y + y2 = 0.2

The y term is -0.7y.  Take half its coefficient (-0.35).
Square it (0.1225) and add it to both sides.

Add '0.1225' to each side of the equation.
-0.7y + 0.1225 + y2 = 0.2 + 0.1225

Reorder the terms:
0.1225 + -0.7y + y2 = 0.2 + 0.1225

Combine like terms: 0.2 + 0.1225 = 0.3225
0.1225 + -0.7y + y2 = 0.3225

Factor a perfect square on the left side:
(y + -0.35)(y + -0.35) = 0.3225

Calculate the square root of the right side: 0.567890835

Break this problem into two subproblems by setting 
(y + -0.35) equal to 0.567890835 and -0.567890835.

Subproblem 1

y + -0.35 = 0.567890835 Simplifying y + -0.35 = 0.567890835 Reorder the terms: -0.35 + y = 0.567890835 Solving -0.35 + y = 0.567890835 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.35' to each side of the equation. -0.35 + 0.35 + y = 0.567890835 + 0.35 Combine like terms: -0.35 + 0.35 = 0.00 0.00 + y = 0.567890835 + 0.35 y = 0.567890835 + 0.35 Combine like terms: 0.567890835 + 0.35 = 0.917890835 y = 0.917890835 Simplifying y = 0.917890835

Subproblem 2

y + -0.35 = -0.567890835 Simplifying y + -0.35 = -0.567890835 Reorder the terms: -0.35 + y = -0.567890835 Solving -0.35 + y = -0.567890835 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.35' to each side of the equation. -0.35 + 0.35 + y = -0.567890835 + 0.35 Combine like terms: -0.35 + 0.35 = 0.00 0.00 + y = -0.567890835 + 0.35 y = -0.567890835 + 0.35 Combine like terms: -0.567890835 + 0.35 = -0.217890835 y = -0.217890835 Simplifying y = -0.217890835

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.917890835, -0.217890835}

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