What are the solution(s) of x2-4-0?
of
x=-4 or x = 4
o x=-2 or x = 2
ox=2
o x=4
o

For , x  = 2, or x = - 2.

Step-by-step explanation:

Here, the given expression is :

Now, using the ALGEBRAIC IDENTITY:

Comparing this with the above expression, we get

⇒Either (x-2) = 0 , or ( x + 2) = 0

So, if ( x- 2)   = 0 ⇒ x =  2

and if ( x + 2) = 0   ⇒ x = -2

Hence, for , x  = 2, or x = - 2.

Step-by-step explanation:

its 4 because 2 times 2 is 4, if you double the number two you get four

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)