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

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


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

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

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

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

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

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

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

Combine like terms: -5y + -6y = -11y
3 + -11y + 7y2 + 3y2 = 0

Combine like terms: 7y2 + 3y2 = 10y2
3 + -11y + 10y2 = 0

Solving
3 + -11y + 10y2 = 0

Solving for variable 'y'.

Factor a trinomial.
(1 + -2y)(3 + -5y) = 0

Subproblem 1

Set the factor '(1 + -2y)' equal to zero and attempt to solve: Simplifying 1 + -2y = 0 Solving 1 + -2y = 0 Move all terms containing y to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -2y = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -2y = 0 + -1 -2y = 0 + -1 Combine like terms: 0 + -1 = -1 -2y = -1 Divide each side by '-2'. y = 0.5 Simplifying y = 0.5

Subproblem 2

Set the factor '(3 + -5y)' equal to zero and attempt to solve: Simplifying 3 + -5y = 0 Solving 3 + -5y = 0 Move all terms containing y to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -5y = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -5y = 0 + -3 -5y = 0 + -3 Combine like terms: 0 + -3 = -3 -5y = -3 Divide each side by '-5'. y = 0.6 Simplifying y = 0.6

Solution

y = {0.5, 0.6}

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