Factor.

d^2 + 5d + 4

(d+1) (d+4) if i can get brainliest that would be great

Step-by-step explanation:

The middle number is 5 and the last number is 4.

Factoring means we want something like

(d+_) (d+_)

Which numbers go in the blanks?

We need two numbers that ...

Add together to get 5

Multiply together to get 4

Can you think of the two numbers?

Try 1 and 4:

1+4 = 5

1*4 = 4

Fill in the blanks in

(d+_) (d+_)

with 1 and 4 to get ...

(d+1) (d+4)