precal hw

need help understanding how the problem was solved

problems 10-13

Completely factor. X" - q x* + 4x +12 given that K= Lis a Zero. Sola! ( 1 - 2 ) ( x - 2 ) ( x+ 3 ) ( x + 1 ) Find the domain of each and Express in interval notation. X a ) J 1 - 3 X b ) ( ) ( x - 2) (x + 7 ) A = F - I J 1 - 3X Sohn : ( - 00 , 3 ] ( - us , # ) ( - 10 , - 7 ) V ( - 7 , 2 ) U 12 Complete the squareIon the equation given. Find the center. os now? q x 3 + 54 3 + 18x -10y- 31 = 0 Sol : ( x + 1 ) 3 + 1 4 - 1 " = 1 - , Center (1, 1 ). 5 9 13 Find the general formula for an Sala ! an =