(1+4x)(1-4x)+16(1/4-x)(x+1/4)=?
问题描述:
(1+4x)(1-4x)+16(1/4-x)(x+1/4)=?
答
(1+4x)(1-4x)+16(1/4-x)(x+1/4)
=1-16x^2+16*(1/16-x^2)
=1-16x^2+1-16x^2
=2-32x^2