Use the graphing features of the calculator to determine the x-intercepts and the vertex of the quadratic functions:
        f(x)=-1.5x²+7x-3
        g(x)=0.4x²+2x-5

• Graph the function in an appropriate window.
• Find the x-intercepts:
  • Press 2nd CALC
  • Choose line 2 (Zero command)
  • Input a left boundary, hit enter
  • Input a right boundary, hit enter
  • Hit enter a third time as a guess.
  • Repeat for the other x-intercept.
    You can also input the boundaries by scrolling left of the intercept, hit enter, scrolling right of the intercept, hit enter, scrolling near the intercept, hit enter.
• Find the vertex:
  • Press 2nd CALC
  • Choose the minimum or maximum command, whichever is appropriate
  • Scroll near the vertex.  Then scroll a few points left of the vertex and hit enter.
  • Scroll a few points to the right of the vertex and hit enter.
  • Scroll near the vertex and hit enter a third time.