(ab-9)(ab+8)=0

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Solution for (ab-9)(ab+8)=0 equation:


Simplifying
(ab + -9)(ab + 8) = 0

Reorder the terms:
(-9 + ab)(ab + 8) = 0

Reorder the terms:
(-9 + ab)(8 + ab) = 0

Multiply (-9 + ab) * (8 + ab)
(-9(8 + ab) + ab(8 + ab)) = 0
((8 * -9 + ab * -9) + ab(8 + ab)) = 0
((-72 + -9ab) + ab(8 + ab)) = 0
(-72 + -9ab + (8 * ab + ab * ab)) = 0
(-72 + -9ab + (8ab + a2b2)) = 0

Combine like terms: -9ab + 8ab = -1ab
(-72 + -1ab + a2b2) = 0

Solving
-72 + -1ab + a2b2 = 0

Solving for variable 'a'.

Factor a trinomial.
(-8 + -1ab)(9 + -1ab) = 0

Subproblem 1

Set the factor '(-8 + -1ab)' equal to zero and attempt to solve: Simplifying -8 + -1ab = 0 Solving -8 + -1ab = 0 Move all terms containing a to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + -1ab = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -1ab = 0 + 8 -1ab = 0 + 8 Combine like terms: 0 + 8 = 8 -1ab = 8 Divide each side by '-1b'. a = -8b-1 Simplifying a = -8b-1

Subproblem 2

Set the factor '(9 + -1ab)' equal to zero and attempt to solve: Simplifying 9 + -1ab = 0 Solving 9 + -1ab = 0 Move all terms containing a to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1ab = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1ab = 0 + -9 -1ab = 0 + -9 Combine like terms: 0 + -9 = -9 -1ab = -9 Divide each side by '-1b'. a = 9b-1 Simplifying a = 9b-1

Solution

a = {-8b-1, 9b-1}

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