Question

упростите выражение 10a ( 5a^2 - 7b ) - 6a (5b + 7a ^2 ) - 3ab

Answer 1

50а2 :5а-70b-35ab -42a2: 3а- 3аb

Answer 2

$50 {a}^{3} - 70ab - 30ab - 42 {a}^{3 } - 3ab \\ = 8 {a}^{3} - 103ab$