Question 7

If $q (x) = - 40 - 2 x + 2 x^{2}$ , find $q (- 4)$
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Answer

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Answer

So, the final answer is $0$ .

Steps

Step 1 ：Let's substitute $x = - 4$ into the equation $q (x) = - 40 - 2 x + 2 x^{2}$ .

Step 2 ：After substituting, we get $q (- 4) = - 40 - 2 (- 4) + 2 (- 4)^{2}$ .

Step 3 ：Solving the equation, we get $q (- 4) = 0$ .

Step 4 ：So, the final answer is $0$ .