When Betty substitutes x=1 into the expression ax^3-2x+c its value is -5. When she substitutes x=4 the expression has value 52. One value of x that makes the expression equal to zero is
Answer Choices
A. 2
B. \frac52
C. 3
D. \frac72
E. 4
When Betty substitutes x=1 into the expression ax^3-2x+c its value is -5. When she substitutes x=4 the expression has value 52. One value of x that makes the expression equal to zero is
Answer Choices
A. 2
B. \frac52
C. 3
D. \frac72
E. 4