Can you factor y^2+49 using the differences of two squares form? why or why not?

No you can't, because if you were to factor this furthur you wouldn't end up with y^2+49 when checking to see if your factorization works. This could work if the equation is y^2-49 because then when you factor it would look like this:

it is contrapositive

i could not see the question too well so check yourself again too . this is because i want you to get it correct.