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  4. The sum of the roots of the quadratic equation x2-10 x+21=0 is

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Q. The sum of the roots of the quadratic equation $x^2-10 x+21=0$ is___

Quadratic Equations

Solution:

$x^2-10 x+21 =0 $
$\Rightarrow(x-3)(x-7) =0 $
$\Rightarrow x =3,7$
The sum will be $3+7=10$