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Rezolvati ecuatiile:
a) x²=49
b)x²-25=0
c)x²-20=29
d)4x²-100=0
e)(x-8)²=0
f)(x+4)=0
g)(x-7)²=25
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Răspuns :

AcelOm
a)x=sqrt49=7
b)x^2=25
x=sqrt25=5
c)x^2=49
x=7
d)4x^2=100
x^2=25
x=5
e)x-8=0
x=8
f)x=-4
g)x-7=5
x=12

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