# What is the minimum or maximum of #j(x)=-5/3x^2+9/10x+21/4#?

##### 1 Answer

Aug 6, 2015

Since the coefficient of

#### Explanation:

To find it, we set the derivative of

So this is the

graph{-5/3x^2+.9x+21/4 [-7.24, 8.564, -1.073, 6.83]}