Question

If -1 is a zero of the polynomial f (x) = x2 − 7x − 8, then calculate the other zero.

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Answer 1

Answer:

8

Step-by-step explanation:

$f(x) = x^2 - 7x - 8$

Let the other zero be $k$

Product of roots = $\dfrac{c}{a} = \dfrac{-8}{1} = -8$

$(-1)(k) = -8$

$k = 8$

Answer 2

Answer:

right answer:8

Step-by-step explanation:

let the second zero of the given polynomial be β and α= -1.then as we know that α+β= -b/a

-1+β=-(-7)/1=7

⇒β=7+1=8

hence, the oyher zero of the polynomial,β=8