Question

e și f vă rog, dau coroana! ​

Answer 1

Răspuns:

Ai răspuns atașat pe foaie.

Answer 2

Răspuns:

Explicație pas cu pas:

$\bf{e)15 \sqrt{7} + 3 \times ( - 4 \sqrt{3} + 5 \times (2 \sqrt{7} + 3 \times (3 \sqrt{3} - 7))) = }$

$\bf{15 \sqrt{7} + 3( - 4 \sqrt{3} + 5(2 \sqrt{7} + 9 \sqrt{3} - 21)) = }$

$\bf{15 \sqrt{7} +3( - 4 \sqrt{3} + 10 \sqrt{7} + 45 \sqrt{3} - 105) = }$

$\bf{15 \sqrt{7} + 3(41 \sqrt{3} + 10 \sqrt{7} - 105) = }$

$\bf{15 \sqrt{7} + 123 \sqrt{3} + 30 \sqrt{7} - 315 = }$

$\large\bf\red{\underline{45 \sqrt{7} + 123 \sqrt{3} - 315 }}$

$\bf{f)2 \sqrt{3} - 7 \times (8 \sqrt{2} - 4 \times (5 \sqrt{3} + 3(4 \sqrt{2} - 3 \sqrt{3} )) \div 8) } =$

$\bf{2 \sqrt{3} - 7(8 \sqrt{2} - 4(5 \sqrt{3} + 12 \sqrt{2} - 9 \sqrt{3} ) \div 12 = }$

$\bf{2 \sqrt{3} - 7 \times (8 \sqrt{2} - ( - 2 \sqrt{3} + 6 \sqrt{2} )) = }$

$\bf{2 \sqrt{3} - 7( 8 \sqrt{2} + 2 \sqrt{3} - 6 \sqrt{2} ) = }$

$\bf{2 \sqrt{3} - 7(2 \sqrt{2} + 2 \sqrt{3}) = }$

$\bf{2 \sqrt{3} - 14 \sqrt{2} - 14 \sqrt{3} = }$

$\bf{2 \sqrt{3} - 14 \sqrt{2} - 14 \sqrt{3} = }$

$\large\bf\purple{\underline{ - 12 \sqrt{3} - 14 \sqrt{2} }}$