if a+b = 9 and ab=20 fine the volue of a²+b²=?
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Answer:
a^+b^2= (a+b)^2-2ab= 81-40=41
Answered by
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Answer:
a²+b²= (a+b)² + 2ab
= (9)²+2(20)
= 81+40
= 3240
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