(2z+9)(2z-7)=0

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Solution for (2z+9)(2z-7)=0 equation:


Simplifying
(2z + 9)(2z + -7) = 0

Reorder the terms:
(9 + 2z)(2z + -7) = 0

Reorder the terms:
(9 + 2z)(-7 + 2z) = 0

Multiply (9 + 2z) * (-7 + 2z)
(9(-7 + 2z) + 2z * (-7 + 2z)) = 0
((-7 * 9 + 2z * 9) + 2z * (-7 + 2z)) = 0
((-63 + 18z) + 2z * (-7 + 2z)) = 0
(-63 + 18z + (-7 * 2z + 2z * 2z)) = 0
(-63 + 18z + (-14z + 4z2)) = 0

Combine like terms: 18z + -14z = 4z
(-63 + 4z + 4z2) = 0

Solving
-63 + 4z + 4z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(-9 + -2z)(7 + -2z) = 0

Subproblem 1

Set the factor '(-9 + -2z)' equal to zero and attempt to solve: Simplifying -9 + -2z = 0 Solving -9 + -2z = 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 + -2z = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -2z = 0 + 9 -2z = 0 + 9 Combine like terms: 0 + 9 = 9 -2z = 9 Divide each side by '-2'. z = -4.5 Simplifying z = -4.5

Subproblem 2

Set the factor '(7 + -2z)' equal to zero and attempt to solve: Simplifying 7 + -2z = 0 Solving 7 + -2z = 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 + -2z = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -2z = 0 + -7 -2z = 0 + -7 Combine like terms: 0 + -7 = -7 -2z = -7 Divide each side by '-2'. z = 3.5 Simplifying z = 3.5

Solution

z = {-4.5, 3.5}

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