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Δ=(5)^2 -4*(-6)= 25+24=49
x1= =
x2==-2
b)2x^2+3x+8=0
Δ=(3)^2-4*(16)=9-64 = -55
brak perwiastków, bo delta jest ujemna
c)5x^2=2-9x
5x^2+9x-2=0
Δ= (9)^2 -4*(-10)=81+40=121
√Δ=11
x1==
x2= =-2
d) -x^2+3x=5
-x^2+3x-5=0
Δ=(3)^2-4*(5)=9-20=-11
brak pierwiastków, bo delta jest ujemna
e) 6x^2=x+1
6x^2-x-1=0
Δ=(-1)^2-4*(-6)=1+24=25
√Δ=5
x1==
x2== -