Question

Find the value that completes the square and then rewrite it as a perfect square.
n^2 + 15n + _

Answer 1

as you know formula is... (a+b)^2 = a^2 + 2ab + b^2
so,
(n)^2 + 2 (n) ( ) + ( )^2
you should have to think that what should be in missing bracket "2 (n) ( )" to make it 15n..
It will be "15/2"
so,
your equation becomes,
(n)^2 + 2 (n) (15/2) + (15/2)^2

Answer 2

Okay, so I have n^2 + 2n7.5 + 56.25.
Where do I go from here? :o

Answer 3

Is my answer 56.25?

Answer 4

yes you have added (15/2)^2 from your side so your answer is right.. but using in fraction form is much better than decimal..

Answer 5

Oh, alright. Thank you!!!

Answer 6

no problem.. :)