245
85
58
524
Correct answer is B
2x2−6x+5=0⟹a=2,b=−6,c=5
α+β=−ba=−(−6)2=3
αβ=ca=52
βα+αβ=β2+α2αβ
(α+β)2−2αβαβ=32−2(52)52
= 452=85
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