Question

(4b2)(5b3)

Answer 1

20b^5

Answer 2

(4b^(2))(5b^(3))

Multiply 4b^(2) by 5b^(3) to get 20b^(5).
(20b^(5))

Answer 3

\[4b ^{2}\times5b ^{3} = 4\times5\times b ^{2+3} = 20\times b ^{5}\]

Answer 4

thanks to all of you
here is another one