Question

Restangeti,dupa ce ati scos factorii de sub radical
a)√32-√50+√8-√98+√242
b)-√162+√200-√72-√128+√18
c)√48-√75+√12+√243-√147

Answer 1

a) √31-√50+√8-√98+√242=
2√2-5√2+2√2-7√2+11√2=
2•(2-5+2-7+11)=
2•(-3-6+11)=
8√2

b) -√162+√200-√72-√128+√18=
-3√2+10√2-6√2-4√2+3√2=
2•(-3+10-6-4+3)=
2•(7+10+3)=
20√2

c) √48-√75+√12+√243-√147=
4√3-5√3+2√3+3√3-7√3=
3•(4-4+2+3-7=
3•(-1+5-7)=
-3√3
Sper ca te-am ajutat.