If a★b=a²+b², find 5★4and 4★5 .
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Formula
(a+b)2=a2+b2+2ab
=>a2+b2=(a+b)2−2ab
Given, a+b=5 and ab=6
So, a2+b2=(a+b)2−2ab=52−2×6=25−12=13
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please mark as brainlist answer
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