分解因式:(y-4)²+10(4-y²)+25
问题描述:
分解因式:(y-4)²+10(4-y²)+25
答
错了
是(y²-4)²+10(4-y²)+25
=(y²-4)²-10(y²-4)+25
=(y²-4-5)²
=(y²-9)²
=(y+3)²(y-3)²