把代數式(a2-2ab+b2+5)(-a2+2ab-b2+5)寫成(5+m)(5-m)的形式,並求出m.

把代數式(a2-2ab+b2+5)(-a2+2ab-b2+5)寫成(5+m)(5-m)的形式,並求出m.

(a2-2ab+b2+5)(-a2+2ab-b2+5)=[5+(a2-2ab+b2)][5-(a2-2ab+b2)]即m=a2-2ab+b2