Help pls? not really sure how to do this

Write each expression in exponential form and find its value.| ! 2 x 2 x 2 x 2

Which triangle congruence postulate or theorem justifies my claim that the steps i made using construction paper and scissors produce an isosceles triangle? was it sss, sas, asa, aas, or hl?

What is the binomial expansion of (2x-3)^5