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Mathematics 10 Online
OpenStudy (anonymous):

What polynomial must be added to −7x3 + 8x − 5 so that the sum is x2 − x − 1 ?

OpenStudy (anonymous):

add in their difference.

OpenStudy (anonymous):

i don't understand?

OpenStudy (anonymous):

What is \[(x^2 -x + 1) - (-7x^3 + 8x - 5)\]

OpenStudy (anonymous):

8x^3+7x-4

OpenStudy (anonymous):

nope :( try again

OpenStudy (anonymous):

-6x+7x-4

OpenStudy (anonymous):

nope :(

OpenStudy (anonymous):

watch out for the exponents.

OpenStudy (anonymous):

7x^3+x^2+7x-4

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