Find the x-intercepts of the polynomial function. State whether the graph crosses the x-axis, or touches the x-axis and turns around, at each intercept. f(x) = x4 - 16x2
A. 0, touches the x-axis and turns around;
16, touches the x-axis and turns around
B. 0, crosses the x-axis;
4, crosses the x-axis;
-4, crosses the x-axis
C. 0, touches the x-axis and turns around;
4, crosses the x-axis;
-4, crosses the x-axis
D. 0, touches the x-axis and turns around;
16, crosses the x-axis
Answer: C
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Find all the rational zeros of the function
a. x = -1, -2
b. x = -2, 2, 1, 3
c. x = 3 , 1
d. x = -2, -1, -3
e. x = -2, 2 -1, 1, -3
Identify the following as rational or irrational. If the number is rational, find the root exactly. If the number is irrational, approximate the number to the nearest thousandth when necessary.
A. Rational; 8 B. Rational; 72 C. Irrational; 2.881 D. Rational; 24
Determine where the function is increasing and where it is decreasing.g(x) = 2x2 + 40x + 196
A. decreasing on (-?, 10) increasing on (10, ?) B. increasing on (-?, -10) decreasing on (-10, ?) C. increasing on (-?, -20) decreasing on (-20, ?) D. decreasing on (-?, -10) increasing on (-10, ?)
List the terms of the expression.-4 + 4m + 6mn
A. -4, 4m, 6mn B. -4, 4m, 6m, n C. -4, 4m, 6m, 6n D. 4m, 6mn