Question

18. If (x - 1) is a factor of x4 + 20x3 - 2x + b and a + b = 4, then ab is
(a) 21
(6) -21
(c) 12
(d) none of these​

Answer 1

Step-by-step explanation:

According to question answer is D) none of these

Answer 2

Answer:

it is still available and if so what time would be good for you to come home and get some rest and feel better soon