Question

If 5 is zero of the polynomial p(x) - 3x2 + x-k, then find the value of "K":
O 50
O 80
O 80
O 70

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Answer 1

Answer:

80

Step-by-step explanation:

let x=5 (zero of the polynomial)

3x²+x-k=0

3(5)²+5-k=0

3(25)+5-k=0

75+5-k=0

80-k=0

-k=-80

k=80

Hope this helps you

Answer 2

answer is 80

Step-by-step explanation:

as we know that , standard form of quadratic equation is ax²+bx+c = 0.

put value (x=5) in the standard equation .

ax²+bx+c=0

3*(5)² + 1*5 - k =0

3* 25 + 5 -k =0

75 +5 = k

80 = k

hope it may help you .....

take this answer brainleast