Question

What are the values of a, b, and c in the quadratic equation 0 = 5x – 4x2 – 2?

a = 5, b = 4, c = 2
a = 5, b = –4, c = –2
a = –4, b = 5, c = –2
a = 4, b = –5, c = –2

Answer 1

a = -4; b = 5; c = -2

Explanation:

quadratic equation: ax^2 + bx + c

a will allways have x squared

b will always have an x

c will always be alone, as it is a constant

Answer 2

a = –4, b = 5, c = –2

Explanation:

We can re-write the quadratic equation 0 = 5x – 4x2 – 2 like this:

– 4x2 + 5x – 2 = 0

ax2 + bx + c = 0

then

a = -4

b = 5

c = -2