3a³-12a²=12a -9-6ab-a²b² 分解因式 快3a³-12a²+ 12a -9-6ab-a²b² a四次方—2a²+1

(1)3a³-12a²+12a
=3a(a²-4a+4)
=3a(a-2)²
( 2) -9-6ab-a²b²
=-(a²b²+6ab+9)
=-(ab+3)²
(3) a^4-2a²+1
=(a²-1)²
=(a+1)²(a-1)²

3a³-12a²+12a=3a(a²-4a+4)=3a(a-2)²
-9-6ab-a²b²=-(a²b²+6ab+9)=-(ab+3)²
a^4-2a²+1=(a²-1)²=(a-1)²(a+1)²

3a³-12a²+12a=3a(a²-4a+4) =3a(a-2)²应用提取公因式法和乘法公式法-9-6ab-a²b²=-(a²b²+6ab+9) =-(ab+3)²应用提取公因式法和乘法公式法a^4-2a²+1=(a²-1)...

3a³-12a²+12a
=3a(a²-4a+4)
=3a(a-2)²
-9-6ab-a²b²
=-(a²b²+6ab+9)
=-(ab+3)²
a^4-2a²+1
=(a²-1)²
=(a+1)²(a-1)²