Use the discriminant to determine how many and what kind of solutions the quadratic equation 2x2 - x = - 4 has.

Hey there! I'm happy to help!

Our quadratic equation is 2x²-x=-4. Quadratics follow the form ax²+bx+c=0, so our a is 2, our b is -1, and our c is 4 (add 4 to both sides so we have 2x²-x+4=0, fitting the format).

The discriminant of a quadratic equation is b²-4ac. Here's how to figure out how many and what kind of solutions the equation has given the quadratic equation. I'll call the discriminant D.

If D>0, there are 2 real roots.

If D=0, there is 1 real root.

If D<0, there are 2 complex roots.

So, let's look at our discriminant.

-1²-4(2×4)

1-4(8)

1-32

-31

Our discriminant is less than 0, so we have 2 complex solutions.

Have a wonderful day! :D

answer: a. 13/44

step-by-step explanation: judging by the information given to us, we are looking for experimental probability. we can see that 13 males have chosen chocolate ice cream. there are 44 ice creams in total (remember that the total is always the denominator). so our answer is 13/44.

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

pls mark as brainliest.