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Alessya13
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Rezolvati in R ecuatiile :
a) x^2 -6x +9=25
b)4x^2 +4x +1=9
c)x^2 -12x + 36 =3

Răspuns :

a) x^2 -6x +9=25
(x-3)^2=25
x-3=+/-5
x=3+/-5
x=8 sau x=-2

b)4x^2 +4x +1=9
(2x+1)^2=9
2x+1=+/-3
2x+1=+3
2x=2
x=1
2x+1=-3
2x=-4
x=-2

c)x^2 -12x + 36 =3
(x-6)^2=3
x-6=+/-V3
x=6+V3
sau x=6-V3

"V"=radical
"^"=la puterea

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