Question

va rog ajutatima si pe mine la exercitiu 9 va rog frumos ca imi trebuie acum

Answer 1

1/(√7+√2)=(√7-√2)/(√7+√2)(√7-√2)=(√7-√2)/(7-2)=(√7-√2)/5
1/(√3+√5)=(√3-√5)/(√3+√5)(√3-√5)=(√3-√5)/(3-5)=(√3-√5)/(-2)=(√5-√3)/2
√10/(√10+√6)=√10(√10-√6)/(√10+√6)(√10-√6)=(10-√60)/(10-6)=(10-2√15)4=
=(5-√15)/2
(3√2+√3)/(√2-√3)=(3√2+√3)(√2+√3)/(√2+√3)(√2-√3)=
=(6+√6+3√6+3)/(2-3)=(9+4√6)/(-1)=-9-4√6
(4√3+1)/(√3+1)=(4√3+1)(√3-1)/(√3+1)(√3-1)=(12+√3-4√3-1)/(3-1)=
=(11-3√3)/2
(3√2-√8)/(4√2+√8)=(3√2-2√2)/(4√2+2√2)=√2/6√2=1/6
1/(3√5-2√6)=(3√5+2√6)/(3√5-2√6)(3√5+2√6=(3√5+2√6)/(45-24)=
=(3√5+2√6)/21
1/(√3-√2)²=1/(3-2√6+2)=1/(5-2√6)=(5+2√6)/(5-2√6)(5+2√6)=
=(5+2√6)/(25-24)=(5+2√6)