Question

repede,va roggggg c și d ​

Answer 1

Explicație pas cu pas:

$a)3 \sqrt{11} + ( - 2 \sqrt{11} + 9 \sqrt{11}) - 10 \sqrt{11} = \\ \\ 3 \sqrt{11} + 7 \sqrt{11} - 10 \sqrt{11} = \\ \\ (3 + 7 - 10) \sqrt{11} = \\ \\ 0$

$b)2 \sqrt{2} - (3 \sqrt{2} - 6 \sqrt{2} + \sqrt{2}) - \sqrt{2} = \\ \\ 2 \sqrt{2} - ( - 2 \sqrt{2}) - \sqrt{2} = \\ \\ 2 \sqrt{2} + 2 \sqrt{2} - \sqrt{2} = \\ \\ 3 \sqrt{2}$

$c)(20 \sqrt{6} + 12 \sqrt{6}) - (4 \sqrt{6} - 2 \sqrt{6}) = \\ \\ (20 + 12) \sqrt{6} - (4 - 2) \sqrt{6} = \\ \\ 32 \sqrt{6} - 2 \sqrt{6} = \\ \\ 30 \sqrt{6}$

$d)(33 \sqrt{7} - 50 \sqrt{7}) + ( - 3 \sqrt{7} - 5 \sqrt{7} + \sqrt{7}) = \\ \\ (33 - 50) \sqrt{7} - 3 \sqrt{7} - 5 \sqrt{7} + 1 \sqrt{7} = \\ \\ - 17 \sqrt{7} - 3 \sqrt{7} - 5 \sqrt{7} + 1 \sqrt{7} = \\ \\ ( - 17 - 3 - 5 + 1) \sqrt{7} = \\ \\ ( - 25 + 1) \sqrt{7} = \\ \\ - 24 \sqrt{7}$