Question

Find the number that should be added to the expression to make it a perfect square:
k^2-5k

Answer 1

k^2-5k
k(k-5)
what is (k-3)^2
k^2 + 9 -6k
so we should add ( -k ) and ( 9) to k^2-5k

Answer 2

add 25/4
to make it (k-5/2)^2

Answer 3

assuming your function looks like the following:

Ax^2 + Bx + C

To find the value of c to complete the square you would need to do the following:

make sure A=1 then use equation

C= (B/2)^2

C=6.25

Answer 4

good one vicky:)