问题 填空题

因式分x-2x2=______.

 a3-4a=______

a3-2a2+a=______.

答案

x-2x2=x(1-2x);

a3-4a,

=a(a2-4),

=a(a+2)(a-2);

a3-2a2+a,

=a(a2-2a+1),

=a(a-1)2

故答案为:x(1-2x);a(a+2)(a-2);a(a-1)2

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