4 years ago

It is given that a+b=6 and ab=7. Find the value of a^2 + b^2.

1 answer:

4 0

Use the identity:-

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

Plugging in the given values;-

a^2 + b^2 = 6^2 - 2*7 = 36-14 = 22 Answer

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