Home > A2C > Chapter 10 > Lesson 10.1.1 > Problem 10-22
10-22.
Solve each equation. Homework Help ✎
log2(x) + log2(x − 2) = 3
log(2x) − log(x2) = −2
Remember the properties of logarithms.
log2(x(x − 2)) = 3
x 2 − 2x = 8
x 2 − 2x − 8 = 0
(x − 4)(x + 2) = 0
4, since logarithms of negative numbers are undefined.
See part (a).