find the roots of x²-5/2x+1=0
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Answer
Correct option is
B
2
1
,
2
1
.
The quadratic equation is 2x
2
−2
2
x+1=0.
Comparing it with standard form of quadratic equation ax
2
+bx+c=0,we get a=2,b=−2
2
,c=1 Therefore the roots of the quadratic equation are,
x=
2a
−b±
b
2
−4ac
=
2×2
−(−2
2
)±
(−2
2
)
2
−4×2×1
=
4
(2
2
)±
8−8
=
4
2
2
±0
=
4
2
2
=
2
2
=
2
1
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