如题所述
=-2
2a^2b+4ab-2b
=2b(a^2+2a-1)
a^2+2a-1ä¸è½å解
è¥æ¯a^2+2a+1
=(a+1)^2
2a^2b+4ab+2b
=2b(a^2+2a+1)
=2b(a+1)^2
因式分解:2a的平方b+4ab-2b
有点难度,还算不出来