) 29. 3x x x2 = + −10 x-intercepts: ( f ( ) 3x 9   f x x2 = + + 0 2 = 9 7 81 2 −10 − x − − 4 4       4  8 2 ( )  f x x = 3 49 7 81  2 + − 2 4   2 4 8  x  − =     vertex: 3 , 49  − − 7 81 2  2 4   x − =     x-intercepts:  4  16 4 7 9 − = ± 0  x 4 4 = + 7 9 x − 49 3 2 x + x = ± 4 4 3 2 49 = 2 4   1 or 4 x x = 3 x + = ± 2 7 y-intercept: 2 2 2 3 7 x =− 2 2 (0) 7 − − 4 = –4 (0) (0) 2 f = = 2 or = x x –5 y-intercept: The axis of symmetry is 7 . x = ( ) 02 3(0) f x = + −10 = 4 −10 The axis of symmetry is 3 . x =− 2 (−∞, domain: ∞) range: 81 , − ∞ 8   − 49 , ∞ (−∞, domain: a ∞)
29. f ( x ) = x2 + 3x −10 x-intercepts: f ( x ) =  x2 + 3x + 9  −10 − 9 0 = 2 7 2 81 x − −  4  4     4  8 2 f ( x ) =  x + 3 − 49  7 2 81  2  4 2  x − 4  = 8     vertex:  − 3 , − 49 7 2 81  2 4  x −  =     x-intercepts:  4  16 0 =  x + 3 2 − 49 4 x − 7 = ± 9 4 4 7 9 x + 3 2 = 49 x = ± 4 4  2  4 x 1 or x = 4 x + 3 = ± 7 2 2 2 y-intercept: 2 3 7 x =− 2 2 f (0) = 2 (0) − 7 (0) − 4 = –4 x = 2 or x = –5 y-intercept: f ( x ) = 02 + 3(0) −10 = −10 The axis of symmetry is x 3 . The axis of symmetry is x = 7 . 4 =− 2 domain: (−∞, ∞) range: − 81 , ∞  8  domain: (−∞, ∞) − 49 , ∞ a
Precalculus-Essentials-5th-Edition-Blitzer-Solutions-Manual.docx