(1/4x的平方+x)除以(1/2-x)等于?
问题描述:
(1/4x的平方+x)除以(1/2-x)等于?
1/4x的平方+x)除以(1/2-x)
答
[(1/4x)^2 +x]÷(1/2-x)
=(1/16x^2 +x)×(2-1/x)
=1/8x^2-1/16x+2x-1
=16×(1/8x^2-1/16x+2x-1)
=2x^2-x+32x-16
=2x^2+31x-16