Question

What value of c makes x^2+6+c a perfect square trinomial ?

Answer 1

According to this, then:

6x = 2*sqrt(c)*x

6 = 2*sqrt(c)

3 = sqrt(c)

c = 3^2 = 9

Hope this helps!

Answer 2

c = (1/2(6))^2

= 3^2

= 9 (answer)