Check whether the equation 3 2 – 5 + 2 = 0 has real roots and if it has, find the root by applying Quadratic formula.
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Answer:
similarly (
5
3−
19
) also can be checked
Step-by-step explanation:
5x
2
−6x−2=0
D=b
2
−4ac=36−4(5)(−2)=76
x=
2a
−b±
D
=
10
−(−6)±
76
=
10
6±
76
=
5
3±
19
5x
2
−6x−2=5(
5
3+
19
)
2
−6(
5
3+
19
)−2
=
5
9+19+6
19
−
5
(18+6
19
)
−2
=2−2=0
similarly (
5
3−
19
) also can be checked
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