Question

if a/b = 2/5 , then 2a²/ 3b² ​

Answer 1

Step-by-step explanation:

a<b As C is +ve

∴ac<bc & lly ca<cb

ba=52⇒b=21a

than 7a+5b2a+3b=7a+5×25a2a+3×25a=39a19a=3919

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Answer 2

Step-by-step explanation:

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