Please please please please help

asked Apr 1, 2021 211k views

4 votes

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3 votes

Answer:

$10 {x}^(2) + ( - 18)$

Explanation:

Inserting fx into gx we get

$5(2 {x}^(2) - 5) + 7$

Which then becomes

$10 {x}^(2) - 25 + 7$

And finally the answer is

$10 {x}^(2) - 18$

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