y=(x-12)平方(x-3-5)求导
问题描述：
y=(x-12)平方(x-3-5)求导
答
∵y=(x-12)²(x-3-5)=(x-8)(x-12)²
∴y’=(x-12)²+(x-8)[2(x-12)]=(x-12)(x-12+2x-16)= (x-12)(3x-28)