Question

If x = 4 is the zero of the polynomial p(x) = 2x + k then find k.

Answer 1

Answer:

• x =4 is the zero of the polynomial 2x+k
• Then p(x)=0

$\\ \qquad\quad\sf\rightarrowtail 2x+k=0$

• Put the value of x

$\\ \qquad\quad\sf\rightarrowtail 2(4)+k=0$

$\\ \qquad\quad\sf\rightarrowtail 8+k=0$

$\\ \qquad\quad\sf\rightarrowtail k=-8$

Answer 2

Step-by-step explanation:

x = 4 is the zero of the polynomial p(x) = 2x + k

P(4)=0

=> 2×4+k= 0

=> 8+k= 0

k= -8

so, x = 4 is the zero of the polynomial p(x) = 2x + k then value of k= -8