Помогите упростить...........................................

Question

Помогите упростить...........................................

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Answer 1

Вооот ответт))))))))

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Answer 2

1. √(22+12√2)=√(18+2*2*3*√2+4)=√(3√2)²+2*2*3√2+2²)=√(3√2+2)²=3√2+2.

2. (2√2-1)/(√2+1)=(2√2-1)(√2-1)/((√2+1)(√2-1))=(2√2*√2-√2-2√2+1)/((√2)²-1²)=

=4-3√2+1=5-3√2.

3. 3√2+2+5-3√2=7.

Ответ: D).