If a+b=9 and ab=20,then a2+b2 is
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Answered by
5
[tex]a + b = 9,
ab = 20
a^2 + b^2 = (a+b)^2 - 2ab
= 9^2 - 2*20
= 81 - 40
=41[/tex]
Trisha88:
The answer is 41
Answered by
3
the answer will be 18
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