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I only need number 30 answered

I only need number 30 answered-example-1
User Wayland
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Here, you’re going to be focusing on the function d. The expression there wants you to evaluate d at the value 2a, and then multiply the result by 5. Substituting the x’s in d(x) with 2a:

-(2a)^3+2a+1 = -8a^3+2a+1

Multiplying that polynomial by 5, we get:

-40a^3+10a+5
User Zhangjinzhou
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