Question 449468
The polynomial function f(x) is defined by f(x)=-4x^4+9x^3+2x^2-7x-2. 
Use a graphing calculator to find all the points where there is a local minimum. 
Round to the nearest hundredth. 
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f(x)=-4x^4+9x^3+2x^2-7x-2
As you can see from the graph below, there is only one local minimum at -4.13
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{{{ graph( 300, 200, -6, 5, -10, 10,-4x^4+9x^3+2x^2-7x-2) }}}