find the value of k, for which one root of the quadratic equation kx2 (root) - 14x+ 8=0 is 2
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4
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tanishaangari:
u did this by own or copied from smwhere??
usually for how much marks this question comes
???
tysm
wrong answer
this is a wrong answer you have written 4 instead of 14
Answered by
5
Answer:
k = 5
Step-by-step explanation:
We are given the following quadratic equation
kx² -14x + 8 = 0
We have to find value of k, if one root of the equation is 2
As we know the root is any value of x that satisfies the above equation.
So, taking
x =2
substitute x =2 into above equation
k(2)² -14(2) + 8 = 0
k(4) - 28 + 8 = 0
4k -28 + 8 = 0
4k - 20 = 0
4k = 20
k = 20÷4
k =5
So, our desired value of k is 5
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