y^2-15y-54=0

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Solution for y^2-15y-54=0 equation:


Simplifying
y2 + -15y + -54 = 0

Reorder the terms:
-54 + -15y + y2 = 0

Solving
-54 + -15y + y2 = 0

Solving for variable 'y'.

Factor a trinomial.
(-3 + -1y)(18 + -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 '(18 + -1y)' equal to zero and attempt to solve: Simplifying 18 + -1y = 0 Solving 18 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '-18' to each side of the equation. 18 + -18 + -1y = 0 + -18 Combine like terms: 18 + -18 = 0 0 + -1y = 0 + -18 -1y = 0 + -18 Combine like terms: 0 + -18 = -18 -1y = -18 Divide each side by '-1'. y = 18 Simplifying y = 18

Solution

y = {-3, 18}

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