16r^2+ 2r -4r
16r^2 - 2r
2r ( 8r -1)
Answer:
Step-by-step explanation:

Answer: -2
Different in Squares: a^2 −b^2 =(a+b)(a−b)
Rad 7^2-3^2 —> Rad 7^2=7 and -3^2= -9
—> 7-9= -2
Answer:
its called common sense
Step-by-step explanation:divide negative by the positive leaving you with the commomn answer thus its subtraction