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(√3 +1)(√3-1) - (√2+1)(√2-1)=1 ????

Răspuns :

( a + b)(a - b) = a^2 - b^2

(√3 +1)(√3-1) - (√2+1)(√2-1)=

(√3)² - 1² - (√2² - 1²) =

3 - 1  - 2 + 1 =

2 - 2 + 1 =

0  +1 =

1