49y^2 + 84yz^2 + 36z^2
= (7^2)y^2 + 84yz^2 + (6^2)x^2
= ( 7y +6z) (7y+6z)
= (7y + 6z)^2 ANSWER ???
rosala..is the middle term supposed to be +84yz...???...check it again...
Isnt the problem 49y^2 + 84yz + 36z^2 ??
If so...your final answer is perfect!!!
Oh yes sorry CPhill it was a mistake ! Sorry! I better dont make silly mistakes or else I'll give a zero to me myself!
+11912 
