In the equation 17x^2 = 12x, the value of c is:

a. 17

b. 12

c. 0

The standard form is known to be

ax^2 + bx + c = 0

You were given 7x^2 = 12x.

Subtract 12x from both sides.

7x^2 - 12x = 0

We can easily see that a = 7, b = - 12 and c must be 0.

See below:

7x^2 - 12x = 0 is exactly the same as

7x^2 - 12x + 0 = 0.

So, c = 0.