Răspuns:
Explicație pas cu pas:
[tex]\bf{e)15 \sqrt{7} + 3 \times ( - 4 \sqrt{3} + 5 \times (2 \sqrt{7} + 3 \times (3 \sqrt{3} - 7))) = }[/tex]
[tex]\bf{15 \sqrt{7} + 3( - 4 \sqrt{3} + 5(2 \sqrt{7} + 9 \sqrt{3} - 21)) = }[/tex]
[tex]\bf{15 \sqrt{7} +3( - 4 \sqrt{3} + 10 \sqrt{7} + 45 \sqrt{3} - 105) = }[/tex]
[tex]\bf{15 \sqrt{7} + 3(41 \sqrt{3} + 10 \sqrt{7} - 105) = }[/tex]
[tex]\bf{15 \sqrt{7} + 123 \sqrt{3} + 30 \sqrt{7} - 315 = }[/tex]
[tex]\large\bf\red{\underline{45 \sqrt{7} + 123 \sqrt{3} - 315 }}[/tex]
[tex]\bf{f)2 \sqrt{3} - 7 \times (8 \sqrt{2} - 4 \times (5 \sqrt{3} + 3(4 \sqrt{2} - 3 \sqrt{3} )) \div 8) } =[/tex]
[tex]\bf{2 \sqrt{3} - 7(8 \sqrt{2} - 4(5 \sqrt{3} + 12 \sqrt{2} - 9 \sqrt{3} ) \div 12 = }[/tex]
[tex]\bf{2 \sqrt{3} - 7 \times (8 \sqrt{2} - ( - 2 \sqrt{3} + 6 \sqrt{2} )) = }[/tex]
[tex]\bf{2 \sqrt{3} - 7( 8 \sqrt{2} + 2 \sqrt{3} - 6 \sqrt{2} ) = }[/tex]
[tex]\bf{2 \sqrt{3} - 7(2 \sqrt{2} + 2 \sqrt{3}) = }[/tex]
[tex]\bf{2 \sqrt{3} - 14 \sqrt{2} - 14 \sqrt{3} = }[/tex]
[tex]\bf{2 \sqrt{3} - 14 \sqrt{2} - 14 \sqrt{3} = }[/tex]
[tex]\large\bf\purple{\underline{ - 12 \sqrt{3} - 14 \sqrt{2} }}[/tex]
