Question

2. Soateti factorii de sub radical , apoi calculati :
a (√18 √288)-(√98 √200)
b 4√18 5√108-2√72
c 3√162-5√12-4√75 2√50
d. -4√216 3√96-√54 2√600
 
 Va rog frumos ! :( chiar am nevoie 

Answer 1

a (√18* √288)-(√98* √200)=
= (2√2*144√2)-(7√2*10√2)=
= (288*2)-(70*2)=
= 576-140=436

b 4√18* 5√108-2√72=
= 12√2* 30√3-12√3=
= 360√6-12√3


c 3√162-5√12-4√75* 2√50=
=27√2-10√3-20√3* 10√2=
=27√2-10√3-200√6


d. -4√216* 3√96-√54 * 2√600=
= -24√6* 12√6-3√6 * 20√6=
= -24√6* 12√6-3√6 * 20√6=
=-1728-360=2088