Question

62.251
21 Efectuati calculele:
a (25675 -5/192):(215);
b (7125 - 405): 5 - ( 1134 - 1504); 17;
< (1726 + 1864): 16-16 (1216 - 5600):
d V5 (71445 - 1845)+((1620-1805)

Answer 1

Sper că te-am ajutat! Mult noroc la școală!

Answer 2

Răspuns: Ai mai jos rezolvarea

Explicație pas cu pas:

Buna!

$\bf a)~~ (2\sqrt{675}-5\sqrt{192} ):(2\sqrt{5^{2} } )=$

$\bf (2\sqrt{3 \cdot 15^{2}} - 5\sqrt{3 \cdot 8^{2}}) : (2 \cdot 5 )=$

$\bf (2\cdot 15\sqrt{3}-5\cdot 8\sqrt{3} ):10=$

$\bf (30\sqrt{3}-40\sqrt{3} ):10=$

$\bf (-10\sqrt{3}):10=\boxed{\boxed{\bf -\sqrt{3}}}$

$\it~~$

$\bf b)~~ (\sqrt{125}-\sqrt{405}):\sqrt{5}- (\sqrt{1134}-\sqrt{504}):\sqrt{7} =$

$\bf (5\sqrt{5}-9\sqrt{5}):\sqrt{5}- (9\sqrt{14}-6\sqrt{14}):\sqrt{7} =$

$\bf (-4\sqrt{5}):\sqrt{5}- 3\sqrt{14}:\sqrt{7} =$

$\bf -4\sqrt{5}:\sqrt{5}- 3\sqrt{2} =$

$\boxed{\boxed{\bf -4- 3\sqrt{2}}}$

$\it~~$

$\bf c)~~ (\sqrt{726}-\sqrt{864}):\sqrt{6}-\sqrt{6}\cdot(\sqrt{216}-\sqrt{600}) =$

$\bf (11\sqrt{6}-12\sqrt{6}):\sqrt{6}-\sqrt{6}\cdot(6\sqrt{6}-10\sqrt{6}) =$

$\bf -\sqrt{6}:\sqrt{6}-\sqrt{6}\cdot(-4\sqrt{6}) =$

$\bf -1 + 4\cdot 6 =$

$\bf -1+24$

$\boxed{\boxed{\bf 23}}$

$\it~~$

$\bf d)~~\sqrt{5}\cdot (\sqrt{1445}-\sqrt{845})+(\sqrt{1620}-\sqrt{1805}):\sqrt{5} =$

$\bf \sqrt{5}\cdot (17\sqrt{5}-13\sqrt{5})+(18\sqrt{5}-19\sqrt{5}):\sqrt{5} =$

$\bf \sqrt{5}\cdot (4\sqrt{5})-\sqrt{5}:\sqrt{5} =$

$\bf \sqrt{5} \cdot 4\sqrt{5} -\sqrt{5}:\sqrt{5} =$

$\bf 4 \cdot 5 -1 =$

$\bf 20 -1 =$

$\boxed{\boxed{\bf 19}}$

PS: Daca esti pe telefon te rog sa glisezi spre dreapta pentru a vedea rezolvarea completa.

==pav38==