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

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


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

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

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

Multiply (-8 + f) * (9 + f)
(-8(9 + f) + f(9 + f)) = 0
((9 * -8 + f * -8) + f(9 + f)) = 0
((-72 + -8f) + f(9 + f)) = 0
(-72 + -8f + (9 * f + f * f)) = 0
(-72 + -8f + (9f + f2)) = 0

Combine like terms: -8f + 9f = 1f
(-72 + 1f + f2) = 0

Solving
-72 + 1f + f2 = 0

Solving for variable 'f'.

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

Subproblem 1

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

Subproblem 2

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

Solution

f = {-9, 8}

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