一到数学题,①4a²-4a+1=_________②x²-½x+( )=(x- )²③9/4 a²b²+2abcd+4/9 c²d²=_________④(2a-b)²+8ab=_________⑤(a+b)²-4(a+b)+4=_________⑥a³+a²+¼ a=_________
问题描述:
一到数学题,
①4a²-4a+1=_________
②x²-½x+( )=(x- )²
③9/4 a²b²+2abcd+4/9 c²d²=_________
④(2a-b)²+8ab=_________
⑤(a+b)²-4(a+b)+4=_________
⑥a³+a²+¼ a=_________
答
①4a²-4a+1=_(2a-1)²_
②x²-½x+( 1/4 )=(x- 1/4 )²
③9/4 a²b²+2abcd+4/9 c²d²=(3/2ab+2/3cd)²__
④(2a-b)²+8ab=_(2a+b)²__
⑤(a+b)²-4(a+b)+4=__(a+b-2)²__
⑥a³+a²+¼ a=_a(a+1/2)²___
答
①4a²-4a+1=____(2a-1)²_____②x²-½x+(1/16)=(x-¼)²③9/4 a²b²+2abcd+4/9 c²d²=____(3/2ab+2/3cd)²_____④(2a-b)²+8ab=____(2a+b)²____...