Find the value of k, for which one root of the quadratic equation kx²-14x+8=0 is 5.
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Answer:
Answer is 31/10.
Step-by-step explanation:
For the quadratic equation kx²-14x+8 = 0,
one root is 5
So, x=5 must satisfied to the quadratic equation.
=> k(5)²-14(5) +8 = 0
=> 25k-70+8 = 0
=> 25k = 70-8
=> 20k=62
=> k=62/20
=> k=31/10
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