Answer:
Here we have the equation: 
 
y = 4*x^2 - 4*x - 1 
 
And we should have the graph (you can see it below this answer) 
 
Now we want to find the solutions of: 
 
4*x^2 - 4*x - 1 = 0 
 
These solutions will be the two values of x at which the graph of our function intersects the line y = 0, that is the x-axis. 
 
Then we need to find the two values of x at which our graph intersects the x-axis. 
 
In the graph, we can estimate the solutions as: 
 
x = -0.2 
 
x = 1.2 
 
To find the exact solutions we can use the Bhaskara's equation, and we will find that the solutions are given by: 
 
 
 
Then the two solutions are: 
 
x = (4 + 5.66)/8 = 11.2075 
 
x = (4 - 5.66)/8 = -0.2075
Explanation: