What is the value of the discriminant, b^2-4ac, for the quadratic equation 0=-2x^2-3x+8, and what does it mean about the number of real solutions the equation has?

Value of D=73

D is positive that means  the roots are real and distinct.

Step-by-step explanation:

We have been given a quadratic equation:

We have to find its dicsriminant which is

Here, a=-2 , b=-3 and c=8 on comparing with the general equation

On substituting the values in the formula of discriminant we get:

Value of D=73

If D is positive that means  the roots are real and distinct.

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

answer: ok

step-by-step explanation: