问题
填空题
因式分a2+5a-5b-b2=______.
答案
a2+5a-5b-b2,
=a2-b2+5a-5b,
=(a+b)(a-b)+5(a-b),
=(a-b)(a+b+5).
故答案为:(a-b)(a+b+5).
因式分a2+5a-5b-b2=______.
a2+5a-5b-b2,
=a2-b2+5a-5b,
=(a+b)(a-b)+5(a-b),
=(a-b)(a+b+5).
故答案为:(a-b)(a+b+5).