Given,

p² + 6p + 8

Now first find the numbers whose-

Sum = 6 and

Product = 8

Required numbers are 4 and 2,

So we get;

p² + 6p + 8

= p² + 4p + 2p + 8

= p(p + 4) + 2(p + 4)

= (p + 4)(p + 2)