Question

show that (5/7a-7/5b)^+2ab=25/49a^+49/25b^​

Answer 1

Answer:

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Step-by-step explanation:

(a^3-b^3)=(a-b)(a^2+ab+b^2)

Hence, (7a-5b)(49a^2+35ab+25b^2)

=(7a-5b)[(7a)^2+(7a*5b)+(5b)^2]

=[(7a)^3-(5b)^3]

where, a=(7a)^3 and b=(5b)^3