A) \[2b\]
B) \[2a\]
C) \[2a+2b\]
D) \[2a-2b\]
Correct Answer: A
Solution :
\[(a+b)+(a-b)=a+b-a+b\] \[=b+b=2b\] It is a good idea to memorizes\[(a+b)+\]\[(a-b)=2a\] and\[(a+b)-(a-b)\]. This will be helpful to expedite your calculations now and also in higher classes.You need to login to perform this action.
You will be redirected in
3 sec