Question

punctul 8 tot punctul va roggg

Answer 1

a)1/x=(x+1)/6
x(x+1)=6
x²+x-6=0
Δ=1+24
Δ=25
x₁=(-1-5)/2=(-3)
x₂=(-1+5)/2=2

b)2/x=(x+1)/15
x(x+1)=30
x²+x-30=0
Δ=1+120
Δ=121
x₁=(-1-11)/2=(-6)
x₂=(-1+11)/2=5

c)10/x=(x+1)/2
x(x+1)=20
x²+x-20=0
Δ=1+80
Δ=81
x₁=(-1-9)/2=(-5)
x₂=(-1+9)/2=4

d)24/x=(x+1)/3
x(x+1)=72
x²+1-72=0
Δ=1+288
Δ=289
x₁=(-1-17)/2=(-9)
x₂=(-1+17)/2=8