Question

1.Упростите:
а)17√2-3√32+√50
б)(5√3-√27)×√3
в)(1-√7)*2+2√7
2.Сравните:
а)1/5√75 и 3/8√48
б)1/2√20 и 5/6√45

Answer 1

1.
a)
$17 sqrt{2} - 3 sqrt{32} + sqrt{50} = 17 sqrt{2} - 3 sqrt{ {4}^{2} times 2 } + sqrt{ {5}^{2} times 2 } = 17 sqrt{2} - 12 sqrt{2} + 5 sqrt{2} = 10 sqrt{2}$
б)
$(5 sqrt{3} - sqrt{27} ) times sqrt{3} = (5 sqrt{3} - sqrt{ {3}^{2} times 3 } ) times sqrt{3} = (5 sqrt{3 } - 3 sqrt{3} ) times sqrt{3} = 2 sqrt{3} times sqrt{3} = 2 times 3 = 6$
в)

Answer 2

я сейчас здесь допишу

Answer 3

в) (1-√7)*2+2√7= 2-2√7+2√7=2

Answer 4

как 2, я не шнад

Answer 5

знаю*