Question

(1) x² + 4x – 5 = 0 , x = 1, -1​

Answer 1

Answer:

1²+4(1)-5

1+4-5

5-5=0

for x=-1

(-1)²+4(-1)-5

1-4-5

-3-5

=-8

Answer 2

Answer:

if X=1 ===>0

if X=-1===>-8

Step-by-step explanation:

x^2-4x-5=0

X=1

1+4-5=0

5-5=0

0=0

X=-1

(-1)^2+4(-1)-5=0

1-4-5=0

-8=0