B^2/a^2:(a/a-b - a+b/a)

Question

B^2/a^2:(a/a-b - a+b/a)

Answer 1

B^2/a^2:(a/a-b - a+b/a)= a+b/a
1. a(a/a-b) - a+b(a+b/a)=a^2-(a+b)(a-b)/a(a-b)=a^2-(a^2-b^2)/a(a-b)=a^2-a^2+b^2/a(a-b)=b^2/a(a-b)
2. b^2/a^2:b^2/a(a-b)=b^2/a^2*a(a-b)/b^2=a-b/a

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