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Mihaivolosciuc
a fost răspuns

x²-5x+6=0
x²-11x+18=0
x²+5x-14=0

Răspuns :

Meryistrate
x²-5x+6=0
Δ=√4ac
Δ=√4*1*6
Δ=√24
Δ2√6
x1,x2=+_b√Δ/2a
x1=5*2√6/2*1
x1=10√6/2
x1=5√6
x2=-5*2√6/2
x2=-10√6/2
x2=-5√6
Lia96
a) d=25-24=1
    x1=3
    x2=2

b) d=121-72=49
    rad din d=7
    x1=9
    x2=2

c) d=25+56=81
    rad din d=9
    x1=2
    x2=-7


, unde :
d=delta
rad=radical
d=b²-4ac
x1=(-b+d)/2
x2=(-b-d)/2

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