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. x4 + 2x3 - 63x2 = 0

A. 0, touches the x-axis and turns around;
9, touches the x-axis and turns around;
-7, touches the x-axis and turns around
B. 0, touches the x-axis and turns around;
9, crosses the x-axis;
-7, crosses the x-axis
C. 0, touches the x-axis and turns around;
-9, crosses the x-axis;
7, crosses the x-axis
D. 0, crosses the x-axis;
-9, crosses the x-axis;
7, crosses the x-axis


Answer: C

Mathematics

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