unless test values are theed and 29 B the algebraic sulostitation and Simplification in the rational 35% 4 Zo function is shown X3+7X+ 12 Xz+7x +12 20 x2+ 4x+ 3x+12 0 * (x+ 4 ) E + 3 ( x + 4 ) 40 ( x+4) ( x+3 ) 20) = 0 to findcritical points (-1.5 X = (- 4, -3) Show signs of function X No test values shown ( 3 -4 - 3 X Nota division 70 5 X Critical Points (2 X-1 X+2 X No test values shown 4 5 -4 X-1 x+2 5 ( x+2) - 4 ( x = 1 ) Show signs of function at testvalues (x-1 ) (x +2 ) 5 x + 10 - 4X+4 - 14 -20 ( x - 1), ( x + 2 ) X + 14 . X 4 - 140r-2 2 X21 ( x-1 ) (x+2 ) ( -00 , 14 ] v ( -2, 1 )