= 3 c 2 2 −(− 5) 25 − 24 ± (− 5)2 − 4(2)(3) 5 ± 2(2) 4 The zeros of 2 and ( ) = − + 4 2 are 2 f x x2 x = x − = 2 + 2 . The of the graph of x-intercepts f are = 5 ± 1 = 3 or 1 ( ) 2 − 2 The zeros of = 2 − 5x + 3 are 1 and . F x x2 3 4 2 + and 2 2 . ( ) 38. = 0 x 2 + 4 + 2 = x2 x The of the graph of are 1 and . x-intercepts F 3 f 0 2 = a = = 1, 4, 2 b c 42. ( ) = 0 g x − 4 ± − 4 ± 16 − − 42 4(1)(2) 8 = x = + + = 2x2 5x 3 0 2(1) 2 = 2, = 5, = 3 a b c = − 4 ± 8 = − 4 ± 2 2 = − 2 ± −5 − 52 4(2)(3) −5 25 − 24 ± ± 2 2 2 = = x The zeros of 2(2) 4 ( ) = + 4 + 2 are − 2 − f x x2 x = −5 ± 1 = −1 or − 3 2 and − 2 + 2 . The of the graph of 4 2 x-intercepts f 2 are − 2 The of the graph of are x-intercepts g − 3 − ( The zeros of g 2 −1 and . ) = 2 + 5x + x x2 2 and − 2 + 2 −1 and . 3 are − 3 .
c = 3 2 2 −(− 5) ± (− 5)2 − 4(2)(3) 5 ± 25 − 24 The zeros of f ( x ) = x2 − 4 x + 2 are 2 − 2 and x = = 2(2) 4 2 + 2 . The x-intercepts of the graph of f are = 5 ± 1 = 3 or 1 2 − 2 and 2 + 2 . 4 2 The zeros of F ( x ) = 2 x2 − 5x + 3 are 1 and 3 . 38. f ( x ) = 0 x2 + 4 x + 2 = 0 2 The x-intercepts of the graph of F are 1 and 3 . 2 a = 1, b = 4, c = 2 42. g ( x ) = 0 − 4 ± 42 − 4(1)(2) − 4 ± 16 − 8 x = = 2x2 + 5x + 3 = 0 2(1) 2 a = 2, b = 5, c = 3 = − 4 ± 8 = − 4 ± 2 2 = − 2 ± 2 −5 ± 52 − 4(2)(3) −5 ± 25 − 24 2 2 x = = The zeros of f ( x ) = x2 + 4 x + 2 are − 2 − 2 2(2) 4 = −5 ± 1 = −1 or − 3 and − 2 + 2 . The x-intercepts of the graph of f 4 2 are − 2 − 2 and − 2 + 2 . The zeros of g ( x ) = 2 x2 + 5x + 3 are − 3 2 The x-intercepts of the graph of g are − 3 2 and −1 . and −1 .
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