Question

If p(x) = 3x - 5x - 7k + 1 find k​

Answer 1

Answer:

The value of one of the root is 3

So, 0 = 3(3) - 5(3) - 7k + 1

9 - 15 - 7k + 1 = 0

7k = -3

So, K=-3/7

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Answer 2

Step-by-step explanation:

p(x) = 3x - 5x - 7k + 1

Let x + 1 = 0                 (As the constant value of the polynomial is 1

= x = -1

So, p(x) = 0 = -1                    (As x is the zero of the polynomial)

= p(-1) = 3(-1) - 5(-1) - 7k + 1

= -3 + 5 - 7k + 1 = 0

= 3 - 7k = 0

= -7k = -3

$= k = \frac{3}{7}$