2y(y+3)=20

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Solution for 2y(y+3)=20 equation:


Simplifying
2y(y + 3) = 20

Reorder the terms:
2y(3 + y) = 20
(3 * 2y + y * 2y) = 20
(6y + 2y2) = 20

Solving
6y + 2y2 = 20

Solving for variable 'y'.

Reorder the terms:
-20 + 6y + 2y2 = 20 + -20

Combine like terms: 20 + -20 = 0
-20 + 6y + 2y2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-10 + 3y + y2) = 0

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

Ignore the factor 2.

Subproblem 1

Set the factor '(-5 + -1y)' equal to zero and attempt to solve: Simplifying -5 + -1y = 0 Solving -5 + -1y = 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 + -1y = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1y = 0 + 5 -1y = 0 + 5 Combine like terms: 0 + 5 = 5 -1y = 5 Divide each side by '-1'. y = -5 Simplifying y = -5

Subproblem 2

Set the factor '(2 + -1y)' equal to zero and attempt to solve: Simplifying 2 + -1y = 0 Solving 2 + -1y = 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 + -1y = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1y = 0 + -2 -1y = 0 + -2 Combine like terms: 0 + -2 = -2 -1y = -2 Divide each side by '-1'. y = 2 Simplifying y = 2

Solution

y = {-5, 2}

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