1 ._9 1 186 +9=0
2._46²1326 + 64 0
3. _1642 56y +49 =0
4._25 % - 90x+81=0
5._6462 +966 +36=0
6._16x² + 16x+4=0
7._64b²-646 +16=0
8. – 42² - 20a +25=0
9. _ 9 ² 1 549+81=0
10._64x² -112x +49=0​