prosze na teraz bo potrzebuje tego zadania na jutro pilne plis!!!!!!!!!!!!!!!!!!!

[latex] ( sqrt{7} - 1 ) * ( 1 + sqrt{7} ) = [/latex] = (2.6457513111 - 1) * (1 + 2.6457513111) = 1.6457513111 * 3.6457513111 = 4, 678544343

(√7 - 1)(1 + √7) = (√7)² - 1² = 7 - 1 = 6 (3 + √3)(3 - √3) = 3² - (√3)² = 9 - 3 = 6 (√2 - √6)(√2 + √6) = (√2)² - (√6)² = 2 - 6 = - 4 (3√2 + √10)(3√2 - √10) = (3√2)² - (√10)² = 9 * 2 - 10 = 18 - 10 = 8