Question

what should be subtract from x³-4x-9 to obtain -7x³+x²-4​

Answer 1

Step-by-step explanation:

-7x$(-7x^3+x^2-4)-(x^3-4x-9)\\-7x^3+x^2-4-x^3+4x+9\\-8x^3+x^2-4x^2+5$

#hopeithelps!!!

Answer 2

Answer:

8x^3-x^2-4x-5

Step-by-step explanation:

(x^3-4x-9)-(8x^3-x^2-4x-5)

x^3-4x-9-8x^3+x^2+4x+5

x^3-8x^3+x^2-4x+4x-9+5

-7x^3+x^2-4

Please Friend Subscribe & Support My Channel:

https://www.youtube.com/channel/UCVtK9k5zz-pgwX5Ah-wYiCQ

Its also about math info, math puzzles, brainteaser puzzles ,mastermind puzzles etc...