-4z(z-9)(z+1)=0

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Solution for -4z(z-9)(z+1)=0 equation:


Simplifying
-4z(z + -9)(z + 1) = 0

Reorder the terms:
-4z(-9 + z)(z + 1) = 0

Reorder the terms:
-4z(-9 + z)(1 + z) = 0

Multiply (-9 + z) * (1 + z)
-4z(-9(1 + z) + z(1 + z)) = 0
-4z((1 * -9 + z * -9) + z(1 + z)) = 0
-4z((-9 + -9z) + z(1 + z)) = 0
-4z(-9 + -9z + (1 * z + z * z)) = 0
-4z(-9 + -9z + (1z + z2)) = 0

Combine like terms: -9z + 1z = -8z
-4z(-9 + -8z + z2) = 0
(-9 * -4z + -8z * -4z + z2 * -4z) = 0
(36z + 32z2 + -4z3) = 0

Solving
36z + 32z2 + -4z3 = 0

Solving for variable 'z'.

Factor out the Greatest Common Factor (GCF), '4z'.
4z(9 + 8z + -1z2) = 0

Factor a trinomial.
4z((9 + -1z)(1 + z)) = 0

Ignore the factor 4.

Subproblem 1

Set the factor 'z' equal to zero and attempt to solve: Simplifying z = 0 Solving z = 0 Move all terms containing z to the left, all other terms to the right. Simplifying z = 0

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

Subproblem 3

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

Solution

z = {0, 9, -1}

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