D
Step-by-step explanation:
Use the FOIL method and multiply it out, and you should get
16x^2+28x-28x-49
Simplify that and you get the answer.
d) 48
step-by-step explanation:
16,32,48,64,80,96,112,128,144,160,176,192,208,224,240,256,272,288,304,320,336
options