问题
填空题
因式分x2-16=______,25x2+10xy+y2=______.
答案
x2-16=x2-42=(x+4)(x-4),25x2+10xy+y2=(5x)2+2•5x•y+y2=(5x+y)2.
故答案为:(x+4)(x-4);(5x+y)2
因式分x2-16=______,25x2+10xy+y2=______.
x2-16=x2-42=(x+4)(x-4),25x2+10xy+y2=(5x)2+2•5x•y+y2=(5x+y)2.
故答案为:(x+4)(x-4);(5x+y)2