Решите уравнения:

9x² − 1 = 0
1 + 4y² = 0
4x² − 3x = 0
−5x² + 7x = 0
−8x² = 0
16x² − 9 = 0
5y² +2 = 0
−2x² + 5х = 0
4x² − 9х = 0
10x² = 0
25x² − 4 = 0
3y² + 1 = 0
6x² − 4х = 0
−3x² + 9х = 0
23x² = 0