the roots of quadratic equation 5×2-4 x+5
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Answer:
The two roots of the quadratic equation ax
2
+bx+c=0 are given by,
x=
2a
−b±
b
2
−4ac
For the given equation 5x
2
−4x−7=0,
b
2
−4ac=(−4)
2
−4(5)(−7)=16+140=156
So, the roots are,
x=
2(5)
4±
156
x=
10
4±2
39
x=
5
2±
39
l
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