Question

a
Scoateţi factorii de sub radicali, apoi efectuați calculele.

$\sqrt{2} + \sqrt{8}$ =
$\sqrt{3} + \sqrt{12}$ =
$\sqrt{5} - \sqrt{20}$ =
$3 \sqrt{2} + \sqrt{18} - \sqrt{32}$ =
$7 \sqrt{3} + \sqrt{27} - \sqrt{48}$ =
$\sqrt{28} + \sqrt{63} - \sqrt{175}$ =
​

Answer 1

Răspuns:

/=radical ( nu am radical si pun / in locul lui )

Explicație pas cu pas:

/2+/8=/2+2/2=3/2

/3+/12=/3+2/3=3/3

/5+/20=/5+2/5=3/5

3/2+/18-/32=3/2+3/2-4/2=6/2-4/2=2/2

7/3+/27-/48=7/3+3/3-4/3=10/3-4/3=6/3

/28+/63-/175=2/7+3/7-5/7=5/7-5/7=0