Question

spunetimi si mie macar la una

Answer 1

Răspuns:

Explicație pas cu pas:

a)

3x²-x-2=0

x1,2=1±√1+24/6=1±5/6         x1=1       x2=-4/6=-2/3

3x²-x-2==(x-x1)(x-x2)=(x-1)(3x+2)

b)               x≠{-2/3,-1/2,1}

2x²-x-1=0

x1,2=1±√1+8/4=1±3/4          x1=1      x2=-1/2

2x²-x-1=(x-1)(2x+1)

E(x)=(x-1)(3x+2)/(x-1)(2x+1) : (2x+1+x+1)/(2x+1)=(3x+2)/(2x+1)·(2x+1)/(3x+2)=1