Answer:
12x^2+24x+12
Step-by-step explanation:
(3x+3) * (4x+4)
( x+1)^7
(x +1)^3 * (x+1)^4
Replace x+1 with m
m^3 * m^4
The bases are the same so we can add the exponents
m^ (3+4)
m^7
Replace m with x+1
