Question

find the value of k if 3 is one of the roots of equation 3x²-2x-k=0​

Answer 1

Answer:

3x²-2x-k=0

putting the value x=3

3*3²-2*3-k = 0

27-6-k = 0

k= 21

Answer 2

Answer:

as 3 is one of the roots of the given equation,

3x²-2x-k=0

3(3)²-2(3)-k=0

27- 6-k =0

21 = k

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