One-to-One Property

Section 3.2
30 & 32



Question 30

Use the One-to-One Property for 30 and 32.

log_a (x) = log_a (y) = x = y.

log_2 (x - 3) = log_2 (9)

x - 3 = 9

x = 9 + 3

x = 12

Question 32

Note: log without a base means log_10.

log (x^2 + 6x) = log 27

x^2 + 6x = 27

x^2 + 6x - 27 = 0

(x + 9)(x - 3) = 0

x + 9 = 0

x = -9

x - 3 = 0

x = 3

You say?

 

correct

 

Not too bad in this section.