Question

If a=-3/2 and b=4/5 verify that [a×b|=|a|×|b|​

Answer 1

Answer:

LHS,

| axb | = | -3/2 x 4/5 | = | -6/5 | = 6/5

RHS,

|a|×|b| = | -3/2 | x | 4/5 | = 3/2 X 4/5 = 6/5

So, LHS = RHS, Hence proved

Hope This helps ☺️