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Find the sum of the coefficients in the polynomial 3(3x^7 + 8x^4 - 7) + 7(x^5 + 7x^2 + 5) when it is fully simplified.

 Aug 9, 2021
 #1
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Here guest,

 

In order to find the sum of the coefficients, you need to simplify.

 

3(3x7+8x4-7) + 7(x5+7x2+5)

= 9x7+24x4-21+7x5+49x2+35

So the sum of the coefficients are:

9+24+7+49 = 89

 

So the sum of the coefficients is 89

angelangelangel

 Aug 9, 2021

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