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Find the value of k for …

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Find the value of k for which one root of the quadratic equation kx-14x+8=0 is 2

Posted by Sidharth .V.Nair 7 years, 2 months ago

CBSE > Class 10 > Mathematics

6 answers

Himanshi Sharma 7 years, 2 months ago

K=10

Yogita Ingle 7 years, 2 months ago

kx - 14x + 8 = 0
If x = 2
k(2) - 14(2) + 8 = 0
2k - 28 + 8 = 0
2k - 20 = 0
2k = 20
k = 10

Puja Sahoo? 7 years, 2 months ago

Sorry, it will be K=10. My previous answer was wrong.

Shriyanshi Gupta 7 years, 2 months ago

F(x)=kx-14x+8=0 =K(2)-14(2)+8=0 =2k-28+8=0 =2k-36=0. =2k=36 =K=36÷2 K=18

D.J Alok 7 years, 2 months ago

Let P(x)=kx-14x+8=0 =P(2)=k(2)-14(2)+8=0 =2k-28+8=0 =2k-20=0 =2k=20 =K=10

Puja Sahoo? 7 years, 2 months ago

K=18.

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