Question

x^2 + 4x - 5 =0 ;x=1 , x= -1​

Answer 1

Answer:

x=1

Step-by-step explanation:

x^2+4x-5=0

(x=1)

1^2+4×1-5=0

1+4-5=0

5-5=0

Answer 2

given equation is x²+5x-5=0

let x=1 then (1)²+4(1)-5=0

= 1+4-5=0

0=0

therefore x=1 is a zero of given polynomial

now let take x= -1 then (-1)²+4(-1)-5=0

= 1-4-5=0

1-9=0

-8=0

by taking the value of x= -1,we get the value of given equatiom is -8, so it is not a zero of given polynomial