7. Determine an interval in which all real zeros of f(x) = x+ + x3 – 7x2 - x + 6 must lie. Explain your reasoning using
the upper and lower bound tests. Then find all real zeros.

you have 6 cupcakes

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

eventually after a few more steps, your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x