z^2=15z+54

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Solution for z^2=15z+54 equation:


Simplifying
z2 = 15z + 54

Reorder the terms:
z2 = 54 + 15z

Solving
z2 = 54 + 15z

Solving for variable 'z'.

Reorder the terms:
-54 + -15z + z2 = 54 + 15z + -54 + -15z

Reorder the terms:
-54 + -15z + z2 = 54 + -54 + 15z + -15z

Combine like terms: 54 + -54 = 0
-54 + -15z + z2 = 0 + 15z + -15z
-54 + -15z + z2 = 15z + -15z

Combine like terms: 15z + -15z = 0
-54 + -15z + z2 = 0

Factor a trinomial.
(-3 + -1z)(18 + -1z) = 0

Subproblem 1

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

Subproblem 2

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

Solution

z = {-3, 18}

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