2.a²b²-23abc+60c²
3.a³-5a²b-24ab²
4.3ab²-9a²b²+6a³b²
2.a²b²-23abc+60c²
3.a³-5a²b-24ab²
4.3ab²-9a²b²+6a³b²
(1)
a²b²-23abc+60c²
=(ab)²-23abc+60c²
=(ab-3c)(ab-20c)
(2)
a³-5a²b-24ab²
=a(a²-5ab-24b²)
=a(a-8b)(a+3b)
(3)
3ab²-9a²b²+6a³b²
=3ab(b-3ab+2a²b)
2. a²b²-23abc+60c²=(ab-20c)(ab-3c)
3.a³-5a²b-24ab²=a(a^2-5ab-24b^2)=a(a-8b)(a+3b)
4.3ab²-9a²b²+6a³b²=3ab^2(1-3a+2a^2)=3ab^2(1-2a)(1-a)或3ab^2(a-1)(2a-1)
1.原式=(ab-3c)(ab-20c)
2,原式=a(a^2-5ab-24b^2)=a(a+3b)(a-8b)
3.原式=3ab^2(1-3a+2a^2)=3ab^2(a-1)(2a-1)
a²b²-23abc+60c²
=(ab-20c)(ab-3c)
3.a³-5a²b-24ab²
=a(a^2-5ab-24b^2)
=a(a+3b)(a-8b)
4.3ab²-9a²b²+6a³b²
=3ab^2(1-3a+2a^2)
=3ab^2(1-2a)(1-a)
2.a²b²-23abc+60c²=(ab-20c)(ab-3c)
a²b²-23abc+60c²=a²b²-20abc-3abc+60c²=(ab-20c)(ab-3c)