9=4y-y(y-2)

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Solution for 9=4y-y(y-2) equation:


Simplifying
9 = 4y + -1y(y + -2)

Reorder the terms:
9 = 4y + -1y(-2 + y)
9 = 4y + (-2 * -1y + y * -1y)
9 = 4y + (2y + -1y2)

Combine like terms: 4y + 2y = 6y
9 = 6y + -1y2

Solving
9 = 6y + -1y2

Solving for variable 'y'.

Reorder the terms:
9 + -6y + y2 = 6y + -6y + -1y2 + y2

Combine like terms: 6y + -6y = 0
9 + -6y + y2 = 0 + -1y2 + y2
9 + -6y + y2 = -1y2 + y2

Combine like terms: -1y2 + y2 = 0
9 + -6y + y2 = 0

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

Subproblem 1

Set the factor '(3 + -1y)' equal to zero and attempt to solve: Simplifying 3 + -1y = 0 Solving 3 + -1y = 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 + -1y = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1y = 0 + -3 -1y = 0 + -3 Combine like terms: 0 + -3 = -3 -1y = -3 Divide each side by '-1'. y = 3 Simplifying y = 3

Subproblem 2

Set the factor '(3 + -1y)' equal to zero and attempt to solve: Simplifying 3 + -1y = 0 Solving 3 + -1y = 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 + -1y = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1y = 0 + -3 -1y = 0 + -3 Combine like terms: 0 + -3 = -3 -1y = -3 Divide each side by '-1'. y = 3 Simplifying y = 3

Solution

y = {3, 3}

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