How do you find the gcf of 2 numbers

To find the GCF of two numbers, list all the factors of those numbers, then underline all the matching factors, and finally find the grates common factor.

Example:

GCF (30, 25) = x

30: 1,2,3,5,6,10,15,30

25: 1,5,25

Common Factors: 1, 5

Greatest Common Factor: 5

x=5

GCF (30,25)=5

Answer-

The value of k is 6

Solution-

The trinomial given here,

While factoring a trinomial into two binomial, middle term factorization is followed.

The general form is,

Comparing this with the given trinomial

Putting the value of k,

Therefore, the value of k is 6