1). -8x^2
2). 6x
3). -40x^2
4). -2x

Answer:
6x
Step-by-step explanation:
I guess it is but i don't know exact answer
Answer:
-8x^2
Step-by-step explanation:
This works like multiplying numbers "by hand." The partial product in the bottom row comes from two multiplications: (-4x)(-1) = +4x, shown in red in the attached image. The second multiplication is (-4x)(2x) = -8x, shown in blue.