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24-04-2021
Mathematics

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Given that a - b = 3 and ab=5, find, without the use of a calculator,
the value of a^2 +b^2?

Respuesta :

24-04-2021

Answer:

19

Step-by-step explanation:

a-b=3 ab=5

a²+b² = (a-b)²+2ab ( a general formula)

= 3²+2×5

=9+10 = 19

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