Question

plz solve step by step

Answer 1

please tell what we have to do?

if add then , answer

13x^2 - 4x - 14

Answer 2

here is your answer ☺☺
$5x - 2x {}^{2} - 8 + 8x { }^{2} - 7x - 9 + 3 + 7x {}^{2} - 2x \\ - 4x + 13x {}^{2} - 14$
in arranging --->

$13x {}^{2} - 4x + 14$
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