Question

Evaluate using identity 38multiply 42

Answer 1

Answer:

(40-2)(40+2)

(40)^2 - (2)^2

1600-4

1596

Answer 2

Answer:

as we write 38=40-2

or42=40+2

so. by using formula a²-b²

40²-2²

=1600-4

=1596 is correct ans.