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Q.

Which of the following equations has two distinct real roots

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a

2x232x+94=0

b

5x23x+1=0

c

x2+x5=0

d

x2+3x+22=0

answer is B.

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Detailed Solution

Option(A): 2x232x+94=0

D=b24ac=184(2)(29)=1818=0

Given have equal roots

Option(B):x2+x5=0

D=14(1)(5)=1+20=21>0

Given equation has real and distinct roots.

Option(C): x2+3x+22=0

D=(3)24(1)(22)=982<0

Given equation does not have real roots.

Option(D): 5x23x+1=0

D=(3)24(5)(1)=920=11<0

Given equation does not have real roots.

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