👤

solutia reala a ecuatiei 0,(3)x la puterea 2 =27/256

Răspuns :

0,(3)x² =27/256
0,(3)=3/9=1/3
x²/3=27/256
x²=27×3/256
x²=81/256
x²=(9/16)²
x₁=9/16
x₂=-9/16