Question

rezolvati ecuatia x la puterea2a -5x-5=0

Answer 1

x²-5x-5=0

a=1;b=-5;c=-5

Δ=b²-4ac=(-5)²-4*1*(-5)=25+20=45

x₁₂=(-b±√Δ)/2a=(5±3√5)/2

x₁=(5+3√5)/2

x₂=(5-3√5)/2

S={(5±3√5)/2}

Answer 2

Răspuns

Explicație pas cu pas:

(x)^2 -5x -5 = 0

Δ = 25+20 = 45

x1,2 = (5+/- rad45) / 2 = (5 +/- 3rad5) / 2.