Răspunsuri

2014-04-15T21:25:11+03:00
1)7x/x²-25=7x/(x-5)(x+5)
2) (x²-2)/(3x+1)
a) pt.x=2⇒(2²-2)/(3·2+1)⇒2/7
b) ptx=√3⇒raportul =(√3²-2)/3√3+1)=(3-2)/(3√3+1)=1/3√3+1
3)x²+36/(x+6)(x+6)=(x²+36)/(x+6)²
b)(x²-16)/(x²-8x+16)=(x-4)(x+4)/(x-4)(x-4)=(x+4)/(x-4)
Multumesc foarte mult) daca ce eu pot sa ma apalez la dumneavoastra?