( f ) = 0 − 4)( − 1) = 0 x2 ( − 5x2 + 4 = 0 x4 − = − = 4 0 or 1 0 x2 x2 x = ±2 = ±1 or ( ) x x The zeros of = − 5x2 + 4 are −2 , −1 , f x x4 1, and 2. The of the graph of are x-intercepts f + − = + − 5x 3 2 7 x2 x2 x , −1 , 1, and 2. 27 ( ) = 0 f x 0 = + 2 − 24 x2 x 70. 4 2 ( ( 0 = + 6) x x −2 − 4) + 6 = 0 x − 10 + 25 = 0 − = x 4 x or x 0 = x = 4 x ( −6 − 5)2 = 0 x2 The of the points of intersection x-coordinates are −6 and 4. The are y-coordinates − 5 = 0 x2 2 (−6) (−6)2 (−6) − − − = + 5 3 = 36 30 3 = f = 5 x 3 and = ± 5 x (4) (4) = + − = + − = 42 5 3 16 20 3 33 . f The graphs of the and intersect at the points f g The of ( ) −10x2 − = + 25 are 5 f x x4 (4, (−6, 3) and 33) . and 5 . The of the graph of are x-intercepts f − 5 and 5 .
f ( x ) = 0 x4 − 5x2 + 4 = 0 ( − 4)( x2 − 1) = 0 x2 − 4 = 0 or x2 − 1 = 0 x = ±2 or x = ±1 The zeros of ( ) f x = x4 − 5x2 + 4 are −2 , −1 , 1, and 2. The x-intercepts of the graph of f are x2 + 5x − 3 = 2 x2 + 7 x − 27 0 = x2 + 2 x − 24 0 = ( x + 6) ( x − 4) 70. −2 , −1 , 1, and 2. f ( x ) = 0 4 2 x + 6 = 0 or x − 4 = 0 x − 10 x + 25 = 0 x = −6 x = 4 ( x2 − 5)2 = 0 The x-coordinates of the points of intersection are −6 and 4. The y-coordinates are x2 − 5 = 0 2 f (−6) = (−6)2 + 5 (−6) − 3 = 36 − 30 − 3 = 3 and f (4) = 42 + 5 (4) − 3 = 16 + 20 − 3 = 33 . x = 5 x = ± 5 The graphs of the f and g intersect at the points The of f ( x ) = x4 −10x2 + 25 are − 5 (−6, 3) and (4, 33) . and 5 . The x-intercepts of the graph of f are − 5 and 5 .