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