Question

СРОЧНО 60 БАЛЛ!!!!!!!!!!!!!!​

Answer 1

(√7 + 7)/√7 = (√7 + √7²)/√7 = 1 + √7

(√15 - 15)/√15 = (√15 - √15²)/√15 = 1 - √15

(1 - √7)²/(√7 - 4) = (1 - 2√7 + 7)/(√7 - 4) = -2(√7 - 4)/(√7 - 4) = -2

( 1 + √2)²/ √(3 + 2√2) = (1 + √2)²/√(1 + 2√2 + √2²) = (1 + √2)²/√(1 + √2)² = (1 + √2)²/(1 + √2) = 1 + √2