Math Help!! Multiplying Variables!?

Question

my teacher gave us about 6 problems N i dont know how to work them. can you show me step-by-step how ya do them? you dont have to do all of the problems because i want to do the rest so that i can learn from it...


1.) (-8x)2 (-x3) ..-->> the 2 and 3 are exponents

2.) -3/7(-w2)(7w2)...-->> the 2's are exponents

3.) 4w2 -w(2w-3)..-->> the 2 in (4w"2") is an exponent

thanks for the help!

Answer 1

1.) (-8x)^2 (-x^3)
= 64 x^2 -x^3

2.) -3/7(-w^2)(7w^2)
= 3w^4 {Note that w^2*w^2 = w^4, the two 7's cancel, and the two minuses make a plus}

3.) 4w^2 -w(2w-3)
= 4w^2 -2W^2 +3w
= 2w^2 +3w

Note: It is standard to use ^ to mean exponent follows