Use the discriminant to determine the number of solutions.
6. 4x² + 4x-1
a. 2 reals b. 1 real c. o reals d. 4 reals

one real solution

Step-by-step explanation:

Let's recall that for the general quadratic expression: , the discriminant is defined as: (which is the expression that appears inside the square root when solving for the solutions of the quadratic equation:  

In our case, the determinant for   can therefore be written as:   therefore this corresponds to only one real solution for the associated equation:

answer: since the question is talking about growth you have to use the growth formula which is inital amount (1 + growth)^time

step-by-step explanation:

the intial amount is 1200, the growth is 4.8, and the time is 7. plug those numbers into the equation, also i think you have to change 4.8 into a percent. but, i have forgotton how to do that. if this is a online class go on to the lesson.