Răspunsuri

2014-06-10T16:09:49+03:00
A)x2 =169|=>x=√169=13 sau -13 sunt corecte ambele variante c)4x2=-64|:4 X la a2a =-16=>x=- √16=-4 d)(x+3)2=49=>x+9=49=>x=10
2014-06-10T16:15:23+03:00
A)x=+13,x=-13
b)nu are sol in R
c)x=+4,x=-4
d) x^{2} +6x+9=49
 x^{2} +6x-40=0
Δ=196
x=4,x=-10
e) x^{2} -2 \sqrt{2}+2= \frac{8}{9}
Δ= \frac{62}{9}
x=2 \sqrt{2} + \sqrt{ \frac{62}{9 }  /2
x=2 \sqrt{2}- \sqrt{ \frac{62}{9}/2
nu folositi delta adica formula b la patrat - 4ac
si in loc de delta ce pot pune
nu nu folosim asa
pai atunci scoti in factor cum a facut Piggy , eu sunt la liceu de asta folosesc delta e mult mai usor asa dar daca nu ai invatat asta e :)
aha