Răspunsuri

2014-04-18T15:31:59+03:00
0,3x²=3/10x²
0,17=17/100    aducem la acelasi numitor

30 x²+17=44
30x²=44-17
30x²=27
x²=27/30
x²=9/10
x=√9/10
x=√9/√10
x=3/√10   rationalizam cu√10
x=3√10/10