Question

(4a+5) (4a-5)

Answer 1

What is it that you want to do with this expression?

Answer 2

find the product

Answer 3

Start by realizing (a+b)(a-b) = a(a-b) + b(a-b). This is the distributive law of multiplication.

Answer 4

is the answer 16^2-25 ?

Answer 5

No, but you're on the right track. You're getting close. You will solve your problem by figuring out how to square 4a.

Answer 6

isn't that 16a^2 ?

Answer 7

Yes, but you left that out of your answer.

Answer 8

oh, ok thanks

Answer 9

Perhaps that was merely a typo and you wanted the a in it?