# Math - Complex Numbers

posted by
**Danielle**
.

Could someone show me how to get the work for:

3/4 (sqrt)-16/25 ?

The answer says 3/5i.

Could anybody tell me how to get there and work with complex fractions and simplify them? Thanks!

3/4 SQRT(-16/25)

3/4 SQRT( 16/25*-1)

3/4 *4/5 *SQRT( -1)

but the sqrt of -1 is defined as i, so

3/4 *4/5 *SQRT( -1)=

3i/5

i did this the first time, but was like... no that's not right. i feel quite dumb.

ahhh.. thank you so much!

could you help me figure out this problem lena used 7 halfsheets of newspaper to make a ball.What mixed number shows the number of sheets of newspaper she used.