(a²+9)²-36a²因式分解

问题描述:

(a²+9)²-36a²因式分解

(a²+9)²-36a²
=a^4+18a²+9²-36a²
=a^4-18a²+9²
=(a²-9)²
=(a+3)²(a-3)²(x²+5x)²+8x²+40x+16呢(x²+5x)²+8x²+40x+16 =(x²+5x)²+8(x²+5x)+16 =(x²+5x+4)² =(x+1)²(x+4)²