f(-9)=2-8/9(-9)

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Solution for f(-9)=2-8/9(-9) equation: 



f(-9)=2-8/9(-9)

We move all terms to the left:

f(-9)-(2-8/9(-9))=0

We multiply parentheses

-9f-(2-8/9(-9))=0

We multiply all the terms by the denominator


-9f*9(-9))-(2-8=0

Wy multiply elements

-81f^2(--8=0

We use the square of the difference formula

-81f^2(+8=0

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