(9+z)(5z+7)=0

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Solution for (9+z)(5z+7)=0 equation:


Simplifying
(9 + z)(5z + 7) = 0

Reorder the terms:
(9 + z)(7 + 5z) = 0

Multiply (9 + z) * (7 + 5z)
(9(7 + 5z) + z(7 + 5z)) = 0
((7 * 9 + 5z * 9) + z(7 + 5z)) = 0
((63 + 45z) + z(7 + 5z)) = 0
(63 + 45z + (7 * z + 5z * z)) = 0
(63 + 45z + (7z + 5z2)) = 0

Combine like terms: 45z + 7z = 52z
(63 + 52z + 5z2) = 0

Solving
63 + 52z + 5z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(9 + z)(7 + 5z) = 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 '(7 + 5z)' equal to zero and attempt to solve: Simplifying 7 + 5z = 0 Solving 7 + 5z = 0 Move all terms containing z to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 5z = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 5z = 0 + -7 5z = 0 + -7 Combine like terms: 0 + -7 = -7 5z = -7 Divide each side by '5'. z = -1.4 Simplifying z = -1.4

Solution

z = {-9, -1.4}

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