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solniwko [45]
3 years ago
6

I need some help with this!

Mathematics
1 answer:
Dimas [21]3 years ago
3 0

(-x³ +3x +4) -(2x³ +7x² -9) = -x³ +3x +4 -2x³ -7x² +9 . . . . eliminate parentheses

= x³(-1-2) +x²(-7) +x(3) +(4+9)

= -3x³ -7x² +3x +13 . . . matches the second choice.

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First answer gets a thanks
Karolina [17]
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Hope this helps!
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3 years ago
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Natali5045456 [20]

9514 1404 393

Answer:

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Step-by-step explanation:

The problem statement tells us ...

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Answer:

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