Question

x的平方4x+4分之x的平方-4y的平方乘以3x的平方+6xy分之x+2等于几多要写过程

Answer 1

(x^2-4y^2)/(x^2+4x+4)*(x+2)/(3x^2+6xy)

=(x-2y)(x+2y)/(x+2)^2*(x+2)/[3x(x+2y)]

=(x-2y)/[3x(x+2)].