Question

If a>b and b(b-a)>10, which of the following must be true? I. b<0 II. a<0 III. ab<0

Answer 1

b<0

Explanation:

b(b-a)>10

-5=b and -10=a for instance plug in

-5(-5-10)>10

-5(-15)>10 (negative x negative is positive)

75>10