Question

Ma puteti ajuta cu ex. 19 a)


Va roggg!!!

Answer 1

a=2√3+5√2
b=3√2-4√3
c=6√2-5√3
(a+b+c)=2√3+5√2+3√2-4√3+6√2-5√3=14√2-7√3
(a-b+c)=2√3+5√2-3√2+4√3+6√2-5√3=√3+8√2
(a+b+c)-(a-b+c)=14√2-7√3-√3-8√2=6√2-8√3

sau  mai simplu

(a+b+c)-(a-b+c)=a+b+c-a+b-c=2b=2(3√2-4√3)=6√2-8√3