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√Δ=14
x1===-6
x2=
b)Δ=49+72=121
√Δ=11
x1=
x2=
a)x= x= x=-
b)x=0 x=-1 x=-
c)x=0 x=- x=-
d)x= x= x=2
e)x=0 x=1 x=-1
f)x=0 x=3 x=-5