Question

What are the values of a, b, and c in the quadratic equation –2x2 + 4x – 3 = 0?

Answer 1

a=-2

b=4

c=-3

Explanation:

You just compare -2x^2+4x-3=0 to

ax^2+bx+c=0

There is really no work here.

Answer 2

For this case we have that by definition, a quadratic equation is of the form:

`ax ^ 2 + bx + c = 0`

The roots are given by:

`x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2 (a)}`

We have the following equation:

`-2x ^ 2 + 4x-3 = 0`

So:

`a = -2\\b = 4\\c = -3`

Answer:

`a = -2\\b = 4\\c = -3`