Question

алгебра. срочно!!! ​

Answer 1

Ответ:

Объяснение:

1) а.6+7*15+$3^{2}$=120

б. 0,5*9-$7^{2}*2^{3}$= 4,5-49*8=387,5

2) $sqrt{180}=sqrt{9*4*5}=3*2sqrt{5}=6sqrt{5}$

3)$3sqrt{14} =sqrt{14*9} =sqrt{126}$

4)а.  $frac{sqrt{2} }{2}$

  б. $frac{sqrt{x} -sqrt{y} }{x-y}$

5)$frac{(sqrt{3}-1)(sqrt{6} +sqrt{2})}{6-2} =frac{sqrt{18}-sqrt{2}} {4} =frac{2sqrt{2} }{4} =frac{sqrt{2} }{2}$

6)$16-24sqrt{5}+9*5+9-4*5-12sqrt{5}-6*5=20-36sqrt{5}$

7) $frac{sqrt{xy}-sqrt{y}(sqrt{x}-sqrt{y} ) }{sqrt{x}*(sqrt{x}-sqrt{y} )} *frac{x}{y} =frac{ysqrt{x} }{sqrt{x}-sqrt{y}} =frac{yx+ysqrt{xy} }{x-y}$