Question

If one zero of quadratic polynomial 3x² + kx -
2 is-2. Then find value of k.​

Answer 1

Answer:

one zero is -2

(A/q) ,

3x²+kx-2= 0

3(-2) ²+k(-2) -2=0

12-2k-2=0

2k= 10

k=5

hope it helps✌

Answer 2

Given :-

Quadratic equation :- 3x^2 + kx - 2

One of the zeroes is - 2

To Find :-

The value of k = ?

Solution :-

3x^2 + kx - 2

Put the value of one zero in quadratic equation,

3(-2)^2 + k* (-2) - 2

3 * 4 - 2k - 2 = 0

12 - 2k - 2 = 0

10 - 2k = 0

-2k = -10

k = -10/-2

k = 5

Hence , The value of k is 5 .

• Quadratic equation is a equation that have highest degree of power is 2 and can be expressed is ax^2 + bx + c = 0 and a , b not equal to 0 .