Answer:
Four
Step-by-step explanation:
Let's expand and see how many nonzero terms:
⇒ (x+4)(2x²+3x+9)-3(x³-2x²+7x)=
⇒ 2x³ + 3x² + 9x + 8x² + 12 + 36 - 3x³ + 6 x² - 21 x=
⇒ - x³ + 17x² - 12x + 12
As we see the expression has four nonzero terms
X
because its the varible term
Answer: i am not sure but thanks for the points have a good day
17. 20
18. 50
19. 50
20. 70
21. 110
22. 160
I did this assignment already :)
