Question

if x=2 is a zero of the polynomial x2+kx-6, find the value of k​

Answer 1

Answer:

substituting value of x=2in polynomial x2-kx+6. =2×2-k×2+6=0. =4-2k+6=0.

Answer 2

Given:

• If X = 2 is a zero of the polynomial x^2+kx-6.

To Find:

• What is the value of K.

Solution:

Here, x= 2 and we have to put the values in their place.

$\sf \implies \: {x}^{2} + kx - 6 = 0 \\ \\ \sf \implies \: {2}^{2} + k \times 2 - 6 = 0 \\ \\ \sf \implies \: 4 + 2k - 6 = 0 \\ \\ \sf \implies \: 2k = 6 - 4 \\ \\ \sf \implies \: 2k = 2 \\ \\ \sf \implies \therefore \: k = 1$

Hence, The value of K is 1.