Question

Find the value of k from the polynomial
2x^2+kx+7 if one of its zero is - 2.​

Answer 1

Answer:

2x^2+kx+7 =0

On putting x = -2

2(-2)^2 + k(-2) + 7 = 0

8 - 2k + 7 = 0

-2k = - 15

k = 15/2

k = 7.5

Hope it might help u..

Answer 2

Answer:

k=15/2

Step-by-step explanation:

given= 2x²+kx+7

substituting x =-2

2(-2)²+k(-2)+7=0

8-2k+7=0

15-2k=0

2k=15

k=15/2