(7z-4)(z-8)=

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Solution for (7z-4)(z-8)= equation:


Simplifying
(7z + -4)(z + -8) = 0

Reorder the terms:
(-4 + 7z)(z + -8) = 0

Reorder the terms:
(-4 + 7z)(-8 + z) = 0

Multiply (-4 + 7z) * (-8 + z)
(-4(-8 + z) + 7z * (-8 + z)) = 0
((-8 * -4 + z * -4) + 7z * (-8 + z)) = 0
((32 + -4z) + 7z * (-8 + z)) = 0
(32 + -4z + (-8 * 7z + z * 7z)) = 0
(32 + -4z + (-56z + 7z2)) = 0

Combine like terms: -4z + -56z = -60z
(32 + -60z + 7z2) = 0

Solving
32 + -60z + 7z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(4 + -7z)(8 + -1z) = 0

Subproblem 1

Set the factor '(4 + -7z)' equal to zero and attempt to solve: Simplifying 4 + -7z = 0 Solving 4 + -7z = 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 + -7z = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -7z = 0 + -4 -7z = 0 + -4 Combine like terms: 0 + -4 = -4 -7z = -4 Divide each side by '-7'. z = 0.5714285714 Simplifying z = 0.5714285714

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 = {0.5714285714, 8}

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