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If x=3 is one root of …

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If x=3 is one root of the quadratic equation x×x -2kx+6=0 then find the value of k

Posted by Vaishali Pundir 7 years, 7 months ago

CBSE > Class 10 > Mathematics

4 answers

V Sridhar 7 years, 7 months ago

The quadratic equation f (x) = x*x -2kx+6=0

if one of the root is 3 then , f(3) = 3*3 - 2k*3+6 =0 (replacing x by 3 in the equation

i.e., k = 15/6

Tanya Taylor 7 years, 7 months ago

Ans is . 9

Vaishali Pundir 7 years, 7 months ago

How

Sunny Boss 7 years, 7 months ago

Answer is 9

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