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castortr0y [4]
4 years ago
9

Subtract -2k3 + k2 - 9 from 5k3 - 3k + 7.

Mathematics
2 answers:
ser-zykov [4K]4 years ago
8 0
 5k3 - 3k + 7 - (<span>-2k3 + k2 - 9)
= </span> 5k3 - 3k + 7 + 2k3 - k2 + 9
= 7k3 - k2 - 3k + 16
bonufazy [111]4 years ago
3 0

Answer:

7k^3-k^2-3k+16\\

Step-by-step explanation:

we have the expression:

5k^3-3k+7

and we must substract the other expression:

-2k^3+k^2-9

so we will get the following:

5k^3-3k+7-(-2k^3+k^2-9) (we put the minus sign because we are substracting)

So we solve this operation being carefull with the signs:

5k^3-3k+7+2k^3-k^2+9\\

and finally, joining like terms:

7k^3-k^2-3k+16\\

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