填空题
.
8. What is the value of f(x)=3x2-7x+23, when x=-2?
49
9. What is the value of h(x)=x3-2x2+x-2, when x=2?
0
10. What is the value of 
填空题
8. What is the value of f(x)=3x2-7x+23, when x=-2?
填空题
9. What is the value of h(x)=x3-2x2+x-2, when x=2?
填空题
10. What is the value of