Answer:
x^7 + x^6 - 3x^4 + 4x^3 + 6x - 3.
Step-by-step explanation:
(x3 + 2x - 1) (x4 - x3 + 3)
= x^7 - x^6 + 3x^3 + 2x^6 - 2x^4 + 6x - x^4 + x^3 - 3
= x^7 + x^6 - 3x^4 + 4x^3 + 6x - 3.
Make both sides powers of 3:

Make both sides powers of 2:

Answer:
I'm pretty sure its D if not I'm sry
Answer:
number 4 because a triangle is only concidered a triangle when it has an area of 180 degrees
Step-by-step explanation: