Math, asked by ppritijagrawal, 4 months ago

if 7a -5b =6 and ab= 9 then find the value of 49a2+25b2

Answers

Answered by anitadevi09955034327

3

take as

(7a-5b)^2

49a^2+ 25b^2 - 2.7a.5b

49a^2+25b^2 - 70ab

49a^2+25b^2-630=0

49a^2+25b^2=630

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