Question

rezolvați în mulțimea numerelor reale ecuațile:a)x²=0,(3) ,b)x²=0,(6), c)x²=0,8(3) d) x²=0,2(7)​

Answer 1

x∈ℝ

a)x²=0,(3)

x²=3/9

x²=1/3

=> x=±√(1/3)

x=±1/√3

x=±√3/3

b)x²=0,(6)

x²=6/9

x²=2/3

=>x=±√(2/3)

x =±√6/3

c) x²=0,8(3)

x²=(83-8)/90

x²=75/90

x²=15/18

x²=5/6

=>x=±√(5/6)

x=±√30/6

d)x²=0,2(7)

x²=25/90

x²=5/18

=>x=±√(5/18)

x=±√5/3√2

x=±√10/6

➡ Kawaiimath