Question

x²-2x-3=0
Va rog sa ma ajutati urgent
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Answer 1

x² - 2x - 3 = 0

a = 1, b = -2, c = -3

Δ = b² - 4ac = 4 + 12 = 16

x₁ = (- b + √Δ)/2a = (2 + √16)/2 = (2 + 4)/2 = 6/2 = 3

x₂ = (- b - √Δ)/2a = (2 - 4)/2 = - 2/2 = - 1

Answer 2

delta= b^2-4ac= 4+12=16

x1=(-b+Vdelta)/2a=(2+4)/2=6/2=3

x2=(-b-Vdelta)/2a=(2-4)/2= -2/2= -1