-5z(z-2)(z+4)=0

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Solution for -5z(z-2)(z+4)=0 equation:


Simplifying
-5z(z + -2)(z + 4) = 0

Reorder the terms:
-5z(-2 + z)(z + 4) = 0

Reorder the terms:
-5z(-2 + z)(4 + z) = 0

Multiply (-2 + z) * (4 + z)
-5z(-2(4 + z) + z(4 + z)) = 0
-5z((4 * -2 + z * -2) + z(4 + z)) = 0
-5z((-8 + -2z) + z(4 + z)) = 0
-5z(-8 + -2z + (4 * z + z * z)) = 0
-5z(-8 + -2z + (4z + z2)) = 0

Combine like terms: -2z + 4z = 2z
-5z(-8 + 2z + z2) = 0
(-8 * -5z + 2z * -5z + z2 * -5z) = 0
(40z + -10z2 + -5z3) = 0

Solving
40z + -10z2 + -5z3 = 0

Solving for variable 'z'.

Factor out the Greatest Common Factor (GCF), '5z'.
5z(8 + -2z + -1z2) = 0

Factor a trinomial.
5z((2 + -1z)(4 + z)) = 0

Ignore the factor 5.

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 '(2 + -1z)' equal to zero and attempt to solve: Simplifying 2 + -1z = 0 Solving 2 + -1z = 0 Move all terms containing z to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1z = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1z = 0 + -2 -1z = 0 + -2 Combine like terms: 0 + -2 = -2 -1z = -2 Divide each side by '-1'. z = 2 Simplifying z = 2

Subproblem 3

Set the factor '(4 + z)' equal to zero and attempt to solve: Simplifying 4 + z = 0 Solving 4 + z = 0 Move all terms containing z to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + z = 0 + -4 Combine like terms: 4 + -4 = 0 0 + z = 0 + -4 z = 0 + -4 Combine like terms: 0 + -4 = -4 z = -4 Simplifying z = -4

Solution

z = {0, 2, -4}

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