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Mathematics

Grade10

Easy

Question

Find the discriminant of the quadratic equation $5 x squared minus 8 x plus 1 equals 0$ .

40
42
44
46

The correct answer is: 44

for any quadratic equation ax²+bx+c=0 discriminant(D) is :-
D=b²-4(a)(c)
in the given equation $5 x squared minus 8 x plus 1 equals 0$ .
a=5
b=-8
c=1
D=(-8)²-4(5)(1)=64-20=44
discriminant for given equation is 44

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