(z+9)(z+6)=0

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Solution for (z+9)(z+6)=0 equation:


Simplifying
(z + 9)(z + 6) = 0

Reorder the terms:
(9 + z)(z + 6) = 0

Reorder the terms:
(9 + z)(6 + z) = 0

Multiply (9 + z) * (6 + z)
(9(6 + z) + z(6 + z)) = 0
((6 * 9 + z * 9) + z(6 + z)) = 0
((54 + 9z) + z(6 + z)) = 0
(54 + 9z + (6 * z + z * z)) = 0
(54 + 9z + (6z + z2)) = 0

Combine like terms: 9z + 6z = 15z
(54 + 15z + z2) = 0

Solving
54 + 15z + z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(9 + z)(6 + z) = 0

Subproblem 1

Set the factor '(9 + z)' equal to zero and attempt to solve: Simplifying 9 + z = 0 Solving 9 + z = 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 + z = 0 + -9 Combine like terms: 9 + -9 = 0 0 + z = 0 + -9 z = 0 + -9 Combine like terms: 0 + -9 = -9 z = -9 Simplifying z = -9

Subproblem 2

Set the factor '(6 + z)' equal to zero and attempt to solve: Simplifying 6 + z = 0 Solving 6 + z = 0 Move all terms containing z to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + z = 0 + -6 Combine like terms: 6 + -6 = 0 0 + z = 0 + -6 z = 0 + -6 Combine like terms: 0 + -6 = -6 z = -6 Simplifying z = -6

Solution

z = {-9, -6}

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