Question

(1) x^2 + 4x - 5 = 0 , x = 1, -1​

Answer 1

Answer:

x=1,

1²+4.1-5=0

1+4-5=0

5-5=0

0=0

x=-1,

-1²+4.-1(-5)=0

1-4-5=0

-3-5=0

-8≠0

mark as brainliest

Step-by-step explanation:

Answer 2

Step-by-step explanation:

put x=1

$= {x}^{2} + 4x - 5 \\ = {1}^{2} + 4(1) - 5 \\ = 1 + 4 - 5 \\ = 5 - 5 \\ = 0$

put x = -1

$= {x}^{2} + 4x - 5 \\ = {( - 1)}^{2} + 4( - 1) - 5 \\ = 1 - 4 - 5 \\ = 1 - 9 \\ = - 8$