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

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Question : 30
Total: 52
3x22x+33 = 0
Solution:  
We have , 3x22x+33 = 0
Comparing the given equation with the general form ax2 + bx + c = 0,
we get a = 3 , b = 2 , c = 33
∴ x =
b±b24ac
2a
=
(2)±(2)24×3×33
23

=
2±236
23
=
2±34
23
=
2±i34
23

∴ Roots of the given equation are
2+i34
23
and
2i34
23
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