Question

Ajutor, va rog
1. Calculati
( √3 - 2) ( √3 + 2)

Answer 1

$( \sqrt{3} - 2)( \sqrt{3} + 2) =\\(\sqrt{3})^2 - 2^2= \\ 3-4 =\\ -1$

Answer 2

Folosim formula a treia a™ ➖ b ™ = (a - b) (a ➕ b) invers =›
(✅3 ➖ 2 ) (✅3 ➕ 2) = ✅3™ ➖ 2™ = 3 ➖ 4 = - 1

P.S : ™ - la patrat ; ➕- plus ;➖ - minus

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