Question

(4-2rad din 3) la put a 2 a -( 3 -2 rad din 3) la put a 2 a

Answer 1

Aplicam formula diferentei patratelor :

a² - b² = (a - b)(a + b)

(4 - 2√3)² - (3 - 2√3)² = (4 - 2√3 - 3 + 2√3)(4 - 2√3 +3 - 2√3) = 7- 4√3