Question

16a^2+56af+49f^2

Answer 1

(4a+7f)(4a+7f) or (4a+7f)^2
its called a perfect square

Answer 2

thank you so much, i was stuck on that for ever!
did you divide all by 4?

Answer 3

no... he recognised 16a^2 is a perfect square (4a)^2
49f^2 is a perfect square (7f)^2

and the middle term is 2 x 4a x 7f

so it meets all the conditions for a perfect square.

\[(a + b)^2 = a^2 + 2ab + b^2\]

Answer 4

got it, guess you just need a outsideveiw :)

Answer 5

yep...