3y^2+21y=-30

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Solution for 3y^2+21y=-30 equation:


Simplifying
3y2 + 21y = -30

Reorder the terms:
21y + 3y2 = -30

Solving
21y + 3y2 = -30

Solving for variable 'y'.

Reorder the terms:
30 + 21y + 3y2 = -30 + 30

Combine like terms: -30 + 30 = 0
30 + 21y + 3y2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(10 + 7y + y2) = 0

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

Ignore the factor 3.

Subproblem 1

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

Subproblem 2

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

Solution

y = {-5, -2}

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