(-5y^2+4y-7)+(3y^2+6y+1)=

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Solution for (-5y^2+4y-7)+(3y^2+6y+1)= equation:


Simplifying
(-5y2 + 4y + -7) + (3y2 + 6y + 1) = 0

Reorder the terms:
(-7 + 4y + -5y2) + (3y2 + 6y + 1) = 0

Remove parenthesis around (-7 + 4y + -5y2)
-7 + 4y + -5y2 + (3y2 + 6y + 1) = 0

Reorder the terms:
-7 + 4y + -5y2 + (1 + 6y + 3y2) = 0

Remove parenthesis around (1 + 6y + 3y2)
-7 + 4y + -5y2 + 1 + 6y + 3y2 = 0

Reorder the terms:
-7 + 1 + 4y + 6y + -5y2 + 3y2 = 0

Combine like terms: -7 + 1 = -6
-6 + 4y + 6y + -5y2 + 3y2 = 0

Combine like terms: 4y + 6y = 10y
-6 + 10y + -5y2 + 3y2 = 0

Combine like terms: -5y2 + 3y2 = -2y2
-6 + 10y + -2y2 = 0

Solving
-6 + 10y + -2y2 = 0

Solving for variable 'y'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-3 + 5y + -1y2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-3 + 5y + -1y2)' equal to zero and attempt to solve: Simplifying -3 + 5y + -1y2 = 0 Solving -3 + 5y + -1y2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 3 + -5y + y2 = 0 Move the constant term to the right: Add '-3' to each side of the equation. 3 + -5y + -3 + y2 = 0 + -3 Reorder the terms: 3 + -3 + -5y + y2 = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -5y + y2 = 0 + -3 -5y + y2 = 0 + -3 Combine like terms: 0 + -3 = -3 -5y + y2 = -3 The y term is -5y. Take half its coefficient (-2.5). Square it (6.25) and add it to both sides. Add '6.25' to each side of the equation. -5y + 6.25 + y2 = -3 + 6.25 Reorder the terms: 6.25 + -5y + y2 = -3 + 6.25 Combine like terms: -3 + 6.25 = 3.25 6.25 + -5y + y2 = 3.25 Factor a perfect square on the left side: (y + -2.5)(y + -2.5) = 3.25 Calculate the square root of the right side: 1.802775638 Break this problem into two subproblems by setting (y + -2.5) equal to 1.802775638 and -1.802775638.

Subproblem 1

y + -2.5 = 1.802775638 Simplifying y + -2.5 = 1.802775638 Reorder the terms: -2.5 + y = 1.802775638 Solving -2.5 + y = 1.802775638 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + y = 1.802775638 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + y = 1.802775638 + 2.5 y = 1.802775638 + 2.5 Combine like terms: 1.802775638 + 2.5 = 4.302775638 y = 4.302775638 Simplifying y = 4.302775638

Subproblem 2

y + -2.5 = -1.802775638 Simplifying y + -2.5 = -1.802775638 Reorder the terms: -2.5 + y = -1.802775638 Solving -2.5 + y = -1.802775638 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + y = -1.802775638 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + y = -1.802775638 + 2.5 y = -1.802775638 + 2.5 Combine like terms: -1.802775638 + 2.5 = 0.697224362 y = 0.697224362 Simplifying y = 0.697224362

Solution

The solution to the problem is based on the solutions from the subproblems. y = {4.302775638, 0.697224362}

Solution

y = {4.302775638, 0.697224362}

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