分解因式计算:
的有关信息介绍如下:问题补充说明:(1)a²-16,(2)(a+b)²-1(3)-4m²+25n²(4)169(a+b)²-121(a-b)²
(1)a²-16
=(a+4)(a-4)
(2)备型判括况资只觉声导(a+b)²-1
=(a+b+1)(a+b-1)
(3)-4m²+25n²
=25n²-4m²
=(5n+2m)(5n-2m)
(4)16致义铁气加9(a+b)²-121(a-b)²
=[13(a+b)+11(a-b)][13(a粒沉晶盾+b)-11(a-b360问答)]
=(13a+13b+煤丝侵令圆大器造11a-11b)(13a+13b-11a+11b)
=(24a+2b)(2a+24b)
=4(12a+b)师形纪(a+12b)