Question

si a/b=5/7 y a2 - b2 =2100 hallar a

Answer 1

a/b=5/7

a²-b²=2400

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(7k)²-(5k)²=2400

49k²-25k²=2400

24k²=2400
   
    k²=100
    k=√100
    k=10

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Te piden a

5k
5(10)
50

Rpta: a=50