Question

a)3x²-x-2=0
b)u²-10u+4=0

Answer 1

la a) ii 1
lamurirea nu o stiu metoda probelor:d

Answer 2

a)3x²-x-2=0
folosim Δ
Δ=b²-4ac
a=3
b=-1
c=-2
Δ=(-1)²-4*3*(-2)
=1+24
=25
x1=-b-√Δ supra 2a
=1-5 supra 2*3
=-4 supra 6
=-2 supra 3
x2=-b+√Δ supra 2a
=1+5 supra 2*3
=6 supra 6
=1
s=(-2 supra 3 ;1)

u²-10u+4=0
folosim Δ
a=1
b=-10
c=4
Δ=b²-4ac
=(-10)²-4*1*4
=100-16
=84
u1=-b-√Δ supa 2 a
=10-√84 supra 2
u2=-b+√Δ supra 2a
10+√84 supra 2
s=(10-√84 supra 2; 10+√84 supra 2)