Question

Упростите выражение: 1) (1+√5)²;2) (√5-√3)(√5+√3);3) (3√14+√7):√7-2√2

Answer 1

1) (1+√5)²=1+2*√5+5;
2) (√5-√3)(√5+√3)=5-3=2;
3) (3√14+√7):√7-2√2=(3√7*√2+√7):√7-2√2=√7*(3*√2+1):√7-2*√2=(3*√2+1)-2*√2=1+√2.

Answer 2

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