Question

Find the value of 'k', if -1 is the zero of the polynomial⤵
${x}^{2} + 8x + k$
​

Answer 1

substitute x as -1

you get the answer k= 7
hope it helps:)

Answer 2

Heya❤

If -1 is the zero of the polynomial..

then..

x= -1

p (x) = x^2+8x+k

p (x)=0

=> p (-1)=0

Hence..

(-1)^2+8 (-1)+k=0

1-8+k=0

-7+k=0

so..

☆k=7☆

Hope it helps you

✌✌