NCERT Class XI Mathematics - Complex Numbers and Quadratic Equations - Solutions

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Question : 38
Total: 52
3x2−4x+
20
3
=0
Solution:  
We have, 3x2−4x+
20
3
=0
Comparing the given equation with the general form ax2 + bx + c = 0,
we get
a = 3 , b = - 4 , c =
20
3

∴ x =
−b±√b2−4ac
2a
=
−(−4)±√(−4)2−4×3×(
20
3
)
2×3

=
4±√16−80
6
=
4±√−61
6
=
4±8i
6
=
2±4i
3
=
2
3
±
4
3
i
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