2x-5/ x-4 = x TO TEZ NA SPRAWDZIAN SZYBKI BLAGAM !!!!

2x-5/ x-4 = x /* x - 4 2x - 5 = x² - 4x -x² + 2x +4x - 5 = 0 -x² + 6x - 5 = 0 Δ = b² - 4ac = 36 - 20 = 16 √Δ = 4 x₁ = (-b - √Δ) : 2a = -6 - 4 : -2 = - 10 : -2 = 5 x₂ = (-b + √Δ) : 2a = -6 + 4 : -2 = - 2 : -2 = 1

2x-5/ x-4 = x /*x-4 2x-5=x (x-4) 2x-5=x²-4x -x²+2x+4x-5=0 Δ=b²-4ac Δ=36-4×(-1)×(-5)=36-20=16 √Δ=4 x₁=-b-√Δ/2a=¹⁰/₂=5 x₂=-b+√Δ/2a=⁻²/₋₂=1