Question

find the rate of the following x2+4x+5=0 by using formula method​

Answer 1

Answer:

-5,1

Step-by-step explanation:

CALCULATIONS

x^2+4x-5=0

(x-1)(x+5)=0

x=

{-5,1}

PROOF

If x={-5,1}, then the equations

(1) x^2+4x-5=0, where x=-5 returns

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

[25+(-20)]-5=0

5–5=0 and

0=0 prove the root (zero) x=-5

and,

(2) x^2+4x-5=0, where x=1 returns

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

(1+4)–5=0

5–5=0 and

0=0 prove the root (zero) x=1