Question

Ma ajutați vă rog Aducem la forma cea mai simpla : a) √3 (√12 - 2√ 27) ; b) √48-2√ 3 (2-5√ 12 ) c) (3+√3)(2+√3)

Answer 1

√3(√12-2√27)=√3(2√3-2·3√3)=√3(2√3-6√3)=√3·(-4√3)=-4·3=-12

√48-2√3(2-5√12)=4√3-2√3(2-5·2√3)=4√3-2√3(2-10√3)=4√3-4√√3+20·3=60

(3+√3)(2+√3)=6+3√3+3√3+3=9+6√3

(√6+√5)²-√210=6+2√5+5-√210=11+2√5-√210