z^2=18+7z

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Solution for z^2=18+7z equation:


Simplifying
z2 = 18 + 7z

Solving
z2 = 18 + 7z

Solving for variable 'z'.

Reorder the terms:
-18 + -7z + z2 = 18 + 7z + -18 + -7z

Reorder the terms:
-18 + -7z + z2 = 18 + -18 + 7z + -7z

Combine like terms: 18 + -18 = 0
-18 + -7z + z2 = 0 + 7z + -7z
-18 + -7z + z2 = 7z + -7z

Combine like terms: 7z + -7z = 0
-18 + -7z + z2 = 0

Factor a trinomial.
(-2 + -1z)(9 + -1z) = 0

Subproblem 1

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 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

Solution

z = {-2, 9}

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