rozwiąż x^ − 2x − 15 = 0 (^ to do kwadratu ) proszeee
Odp.
x²-2x-15=0
Δ=4-4*1*(-15)=4+60=64
√Δ=8
x1=(2-8)/2=-6/2=-3
x2=(2+8)/2=10/2=5
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Odp.
x²-2x-15=0
Δ=4-4*1*(-15)=4+60=64
√Δ=8
x1=(2-8)/2=-6/2=-3
x2=(2+8)/2=10/2=5
licze na naj