Write equivalent expression for a(x) and b(x) and find the difference of two expressions.

You can find it by multiplying the areas it show u

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.

All you have to do is multiply