254−m
254−2m
254+m
254+2m
Correct answer is A
2x2−5x+m=0
a=2,b=−5,c=m
α+β=−ba=52
αβ=ca=m2
α2+β2=(α+β)2−2αβ
= (52)2−2(m2)
= 254−m
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