3a²2a² + 3b²4a² - 2a²5b²- 3a2ab² - a³2a = 6a⁴ + 12b²a² - 10a²b²- 6a²b² - 2a⁴ =
= 4a⁴ - 4b²a².
1)оз 10
х+3=2
х=2-3
х=-1
2)оз=24
28-4х=57х-33
-61х=-61
х=1