因式分解 10a-1-25a²
问题描述:
因式分解 10a-1-25a²
答
10a-1-25a²=-(5a-1)²
答
10a-1-25a²
=-(25a²-10a+1)
=-(5a-1)²
答
原式=-(25a²-10a+1)
=-(5a-1)²