For each pair of equations below, state whether they are equivalent. If they are equivalent, explain why. If they are...

For each pair of equations below, state whether they are equivalent. If they are equivalent, explain why. If they are not, give a counter example.

a. 3-4(p-6) \text{ and } 3-4p-243−4(p−6) and 3−4p−24
b. (2j-3)(j+4) \text{ and } 2j^2+5j-12(2j−3)(j+4) and 2j2+5j−12