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State whether the following quadratic equations have two distinct real roots. Justify your answer.
\( 2 x^{2}-6 x+\frac{9}{2}=0 \)
Given:
\( 2 x^{2}-6 x+\frac{9}{2}=0 \)To do:
We have to state whether the given quadratic equations have two distinct real roots.
Solution:
$2 x^{2}-6 x+\frac{9}{2}=0$
Comparing with $a x^{2}+b x+c=0$, we get,
$a =2, b=-6$ and $c=\frac{9}{2}$
Discriminant $D=b^{2}-4 a c$
$=(-6)^{2}-4(2)(\frac{9}{2})$
$=36-36$
$=0$
$D=0$
Hence, the equation $2 x^{2}-6 x+\frac{9}{2}=0$ has equal and real roots.
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