Question

Determine the number of real solutions of -2x^2 + 5x - 3 = 0.
A. 0
B. 1 (double root)
C. 2

Answer 1

NOt sure how to do this

Answer 2

What is the discriminant?

Answer 3

ax^+bx+c

Answer 4

Attached are two charts to help you think about this type problem.

Answer 5

ax^2*

Answer 6

ax^2+bx+c is not the discriminant. Read about the discriminant on the attachment above.

Answer 7

b^2-4ac

Answer 8

ok let me try that

Answer 9

is it B

Answer 10

I got 1 for the discriminant but that does not mean that there is a double root.

Answer 11

Ok.

Answer 12

Look at the chart above with the title discriminant and root types.

Under the discriminant column, find the description that fits the type number 1 is and read across the chart and look at the root description. Do that now, please. @Reaper534

Answer 13

2 irrational roots?

Answer 14

Wait 1 is a perfect square right so it would be 2 rational roots right?

Answer 15

\[-2x^2 + 5x - 3 = 0.\]easier to solve
\[2x^2-5x+3=0\] use the quadratic formula

Answer 16

@satellite73 i got -6 and 6.5

Answer 17

-6.5*

Answer 18

i don't think that is right

Answer 19

this one factors as
\[2x^2-5x+3=(2x-3)(x-1)\]

Answer 20

@satellite73 would it be equal to zero?

Answer 21

like (2x-3)(x+1)=0

Answer 22

@Reaper534

>>>Wait 1 is a perfect square right so it would be 2 rational roots right?
Correct

Answer 23

Thanks! So its C correct?

Answer 24

@Directrix

Answer 25

C) 2 is correct @Reaper534