Question

X²+3x+2=0=
2x-3<7=
1/6-1/24+1/8=
Multumesc

Answer 1

Explicație pas cu pas:

x²+3x+2=0 => x²+x+2x+2=0 =>

x(x+1)+2(x+1)=0=>(x+1)(x+2)=0 <=>

x+1=0 => x=-1 sau x+2=0=>x=-2

2x-3<7=>2x<10=>x<5 => x€{0,1,2,3,4} =>

S€{0,1,2,3,4}

1/6 -1/24+1/8=4/24-1/24+3/24=6/24=1/4