F.4'開方化簡'~~~[help]急!!!!!!!~~~~

1a.√8
=√4x2
=2√2

1b.√27
=√9x3
=3√3

1c.√48
=√16x3
=4√3

2a.2√12
=2√4x3
=2x2√3
=4√3

2b.3√20
=3√4x5
=3x2√5
=6√5

2c.5√32
=5√16x2
=5x4√2
=20√2

圖片參考：http://imgcld.yimg.com/8/n/HA00100646/o/701209060033313873365490.jpg

Hope I can help you.