Question

Which of the following statements is NOT true?

(A) (b - a)c = bc - ac

(B) a(-c + b) = -ac + ba

(C) 4a(4b) = 16ab

(D) bc(a - 3) = abc-3

(E) a(-b - c) = -ab - ac

Answer 1

(D)

Explanation:

A is true because c*b=cb and c*-a=-ca.

B is true because a*-c=-ac and a*b=ab.

C is true because 4a*4b is 16*ab so 16ab.

D is NOT true because bc*a=bca and bc*3=3bc so bca-3bc is NOT bca-3