Question

Please Read the Attachment below

Answer 1

Explanation:

`(a -30y)/(a^2 -100y^2) - (10y)/(10ay -a^2)`

`=(a-30y)/(a^2 -(10y)^2) - (10y)/(-a(a -10y))\\\\=(a-30y)/((a -10y)(a+10y)) + (10y)/(a(a -10y))\\\\=(a(a-30y) +10y(a+10y))/(a(a -10y)(a+10y)) \\\\=(a^2 - 30ay +10ay +100y^2)/(a(a-10y)(a+10y))\\\\=(a^2 - 20ay +100y^2)/(a(a-10y)(a+10y))\\\\=((a-10y)^2)/(a(a-10y)(a+10y))\\\\=((a-10y))/(a(a+10y))`