Explaination
Use the distributive property of multiplication when multiplying two binomials, such as in this case. It means that each term in the first binomial (x+6) must be multiplied by each term in the other binomial (4x + 8):
(x+6)(4x + 8)
x(4x + 8) + 6(4x + 8)
$2320_w158_h18.png$
Combining like terms, we have:
$2287_w117_h18.png$