(z+3)(z-8)=0

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Solution for (z+3)(z-8)=0 equation:


Simplifying
(z + 3)(z + -8) = 0

Reorder the terms:
(3 + z)(z + -8) = 0

Reorder the terms:
(3 + z)(-8 + z) = 0

Multiply (3 + z) * (-8 + z)
(3(-8 + z) + z(-8 + z)) = 0
((-8 * 3 + z * 3) + z(-8 + z)) = 0
((-24 + 3z) + z(-8 + z)) = 0
(-24 + 3z + (-8 * z + z * z)) = 0
(-24 + 3z + (-8z + z2)) = 0

Combine like terms: 3z + -8z = -5z
(-24 + -5z + z2) = 0

Solving
-24 + -5z + z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(-3 + -1z)(8 + -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 '(8 + -1z)' equal to zero and attempt to solve: Simplifying 8 + -1z = 0 Solving 8 + -1z = 0 Move all terms containing z to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1z = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1z = 0 + -8 -1z = 0 + -8 Combine like terms: 0 + -8 = -8 -1z = -8 Divide each side by '-1'. z = 8 Simplifying z = 8

Solution

z = {-3, 8}

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