Question

Q.3 If 2 is a zero of x2+kx – 10 then value of K=?​

Answer 1

Given: $x^{2} +kx-10$

           $2$  is a zero of the given polynomial.

To find: value of $k$

Step-by-step explanation:

Since 2 is a zero of the given polynomial,

∴ $p(2)=0$

$x^{2} +kx-10=0\\(2)^2+k(2)-10=0\\4+2k-10=0\\2k-6=0\\2k=6\\k=3$