化简(m-1/4n)(m+1/4)-(m-1/4)^2

问题描述:

化简(m-1/4n)(m+1/4)-(m-1/4)^2

(m-1/4)(m+1/4)-(m-1/4)^2
=m^2-1/16-(m^2-m/2+1/16)
=m/2-1/8
(m-1/4n)(m+1/4)-(m-1/4)^2
=m^2-mn/4+m/4-n/16-(m^2-m/2+1/16)
=-mn/4+3m/4-n/16-1/16