Question

Va rog urgent ! dau coroana

Answer 1

Rationalizezi toate fractiile cu V2

8V2 /2 - 6V2/2 + 9V2/2 - 12V2/2 + 7V2/2 + 6/4 = 6V2/2 + 3/2 = (6V2+3)/2

Answer 2

Răspuns:

Explicație pas cu pas:

$\frac{8}{2\sqrt{2}} -\frac{6}{2\sqrt{2} } + \frac{9}{\sqrt{2} } - \frac{12}{\sqrt{2} } + \frac{7}{3\sqrt{2} } + \frac{3\sqrt{2} }{2\sqrt{2} } =$

$\frac{2}{2\sqrt{2} } - \frac{3}{\sqrt{2} } + \frac{7*2\sqrt{2}+3\sqrt{2}*2\sqrt{2} }{3\sqrt{2}*2\sqrt{2} } =$

$\frac{2-6}{2\sqrt{2} } +\frac{14\sqrt{2}+ 12 }{12} =$

$-\frac{4\sqrt{2} }{4} +\frac{2(7\sqrt{2}+6) }{12} =$

$-\frac{6\sqrt{2}+ 7\sqrt{2}+6 }{6} =$ $\frac{\sqrt{2}+6 }{6}$