Question

-3x la a doua +7x=0  multumesc 

Answer 1

a=-3

b=7

c=0

Δ=b²-4ac

Δ=7²-4*3*0

Δ=49

x1=-b+√Δ/2a

x1=-7+√49/2*3

x1=-7+7/6

x1=0/6

x1=0

x2=-b-√Δ/2a

x2=-7-√49/2*3

x2=-7-7/6

x2=-14/6

x2=-7/3

Answer 2

-3x²+7x=0⇒x(-3x+7)=0⇒

$\Rightarrow x_1=0;\ \ x_2=\dfrac73$