Factor.

x2−6x+9
question 2 options:

(x−3)2

(x+3)2

(x−9)2

(x-3)²

Step-by-step explanation:

x²-6x+9

x² can be written as (x)²

9 can be written as 3²

(x)²-6x +(3)

we can break 6x as 2(3)(x)

by using square formula

(a+b)²= a²-2ab+b²

Putting all the values back in expression we get

(x)²-2(3)(x)+(3)²

by closing formula we get

(x-3)²

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)