(z+8)(z-9)=0

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Solution for (z+8)(z-9)=0 equation:


Simplifying
(z + 8)(z + -9) = 0

Reorder the terms:
(8 + z)(z + -9) = 0

Reorder the terms:
(8 + z)(-9 + z) = 0

Multiply (8 + z) * (-9 + z)
(8(-9 + z) + z(-9 + z)) = 0
((-9 * 8 + z * 8) + z(-9 + z)) = 0
((-72 + 8z) + z(-9 + z)) = 0
(-72 + 8z + (-9 * z + z * z)) = 0
(-72 + 8z + (-9z + z2)) = 0

Combine like terms: 8z + -9z = -1z
(-72 + -1z + z2) = 0

Solving
-72 + -1z + z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(-8 + -1z)(9 + -1z) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(9 + -1z)' equal to zero and attempt to solve: Simplifying 9 + -1z = 0 Solving 9 + -1z = 0 Move all terms containing z to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1z = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1z = 0 + -9 -1z = 0 + -9 Combine like terms: 0 + -9 = -9 -1z = -9 Divide each side by '-1'. z = 9 Simplifying z = 9

Solution

z = {-8, 9}

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