Question

6分之1x的2次方2-3分之2y的2次方分之3分之1y-6分之1x约分

Answer 1

(y/3-x/6)/[(1/6)x^2-(2/3)y^2]

分子分母都乘以6,得(2y-x)/(x^2-4y^2)

=-(x-2y)/[(x-2y)(x+2y)]

=-1/(x+2y).