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- WE WANT TO SOLVE THE GIVEN LOG EQUATION, AND, IF NEEDED, ROUND TO FOUR DECIMAL PLACES. NOTICE HOW IN THIS EQUATION, THE TWO LOGARITHMS DONamp;#39;T HAVE THE BASE LISTED WHICH MEANS THESE ARE COMMON LOG OR LOG BASE 10. WHEN WE HAVE AN EQUATION LIKE THIS WHERE WE HAVE TWO LOGARITHMS, OUR GOAL IS TO COMBINE THE LOGARITHMS AND THEN WRITE THE LOG EQUATION AS AN EXPONENTIAL EQUATION TO SOLVE FOR X. SO TO COMBINE THESE TWO LOGARITHMS, BECAUSE WE HAVE A SUM, WEamp;#39;LL USE THE PRODUCT PROPERTY OF LOGARITHMS GIVEN HERE WHERE WE CAN COMBINE THE TWO LOGARITHMS INTO A SINGLE LOG IF WE MULTIPLY THE NUMBER PARTS OF THE LOGARITHMS. SO COMMON LOG X + COMMON LOG OF THE QUANTITY X + 4 IS EQUAL TO THE COMMON LOG OF X x X + 4. THIS IS STILL EQUAL TO +2. LETamp;#39;S GO AHEAD AND FIND THIS PRODUCT. SO WEamp;#39;LL HAVE LOG OF THE QUANTITY X SQUARED + 4X = 2, AND AGAIN, REMEMBERING THIS IS COMMON LOG OR LOG BASE 10, WE CAN NOW WRITE THIS AS AN EXPONENTIAL EQUATION. SO STARTING WITH OUR BASE AND WORK