因式分解:x2+6xy+9y2-16a2+8a-1.
问题描述:
因式分解:x2+6xy+9y2-16a2+8a-1.
答
x2+6xy+9y2-16a2+8a-1
=(x+3y)2-(16a2-8a+1)
=(x+3y)2-(4a-1)2
=(x+3y-4a+1)(x+3y+4a-1).