Asked by Anonymous

Can you please check these problems?

1. -4ã2+6ã72-ã32=_____

I got 2

2. 5ã28+2ã7-ã14=_____

I got 12ã7-ã14

3. -3ã72+6ã52-7ã128=______

I got -89ã8+12ã13-56ã2

4. 4ã112+5ã56-9ã126=____

I got -17ã14+16ã7
Answered by Steve
#1
-4√2+6√72-√32
= -4√2 + 6√36√2 - √16√2
= -4√2 + 36√2 - 4√2
= 28√2

#2 ok

#3 12√13-74√2
remember that √8 = 2√2

#4 ok