1 Answer

Ian Oakes · Answer 1 · 2023-08-19T17:04:25+0000

Answer:

The sum is;

Step-by-step explanation:

We want to know the sum of;

$-3x^2-7x+9\text{ and }-5x^2_{}+6x-4$

Let Add and collect the like terms;

$\begin{gathered} -3x^2-7x+9+(-5x^2_{}+6x-4) \\ =-3x^2-7x+9-5x^2_{}+6x-4 \\ =-3x^2-5x^2_{}-7x+6x+9-4 \\ =-8x^2-x+5 \end{gathered}$

Therefore, the sum is;

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