Question

(x + 8)(y + 3)

Answer 1

so what we have do here?

Answer 2

find the product

Answer 3

using distributive property of multiplication :
x*(y+3)+8*(y+3)
=(x*y+x*3)+(8*y+8*3)
=(xy+3x)+(8y+24)
=xy+3x+8y+24