" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
Δ=4²-4*1*(-21)
Δ=16+84
Δ=100
√Δ=√100=10
x1=-b-√Δ/2a
x1=-4-10/2*1
x1=-14/2
x1=-7
x2=-b+√Δ/2a
x2=-4+10/2*1
x2=3
x=-7 v x=3