Question

一道初一的数学计算题、先化简,在求值.(a的平方乘b+a乘以b的平方)分之a平方-b平方,再除以[1-2ab分之(a的平

Answer 1

(a^2-b^2)/(a^2b+ab^2)/[1-(a^2+b^2)/2ab]

=(a-b)(a+b)/[ab(a+b)]/[(2ab-a^2-b^2)/2ab]

=(a-b)/ab/[-(a-b)^2/2ab]

=-2/(a-b)

=-2/(2+√3-2+√3)

=-√3/3