Question

Efectuati calculele:
a) 2√150+2√3(3√12-√50)-√2(√18-√48)
b) √162{√90-[√360-√20(2√18-√32)]}
VA ROG URGENT...16 PUNCTE!!!!!!!!!!!!

Answer 1

a) 2√150+2√3(3√12-√50)-√2(√18-√48)=10√6+2√3(6√3-5√2)-√2(6√2-4√2)=
10√6+36-10√6-12+8=32
b) √162{√90-[√360-√20(2√18-√32)]}=9√2{3√10-[6√10-2√5(6√2-4√2)]}=
9√2[3√10-(6√10-2√5.2√2)]=9√2[3√10-(6√10-4√10)]=
9√2(3√10-2√10)=9√2.√10=18√5