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Home > CCA2 > Chapter 10 > Lesson 10.2.1 > Problem 10-103

10-103.
  1. Use the properties of logarithms to rewrite each equation and then solve. Check for extraneous roots. Homework Help ✎

    1. log(x) + log(x + 21) = 2

    2. 2log4(x) − log4(3) = 2

    3. log2(9x + 5) − log2(x2 − 1) = 2

    4. log7(x + 1) + log7(x − 5) = 1

See the homework help for problem 10-95.

x = 4

x = 3