Which equation shows the quadratic formula used correctly to solve 5x2 + 3x – 4 = 0 for x?

First option.

Step-by-step explanation:

For a quadratic equation of the form:

a*x^2 + b*x + c = 0

we have that the solutions for x are:

where we have two solutions, one for each sign of the square root.

then if our equation is:

5x^2 + 3x - 4 = 0

we have that 5 = a, 3 = b and -4 = c, then our equation is:

then the correct option is the first one.

828. all there is to it!

here, if you ever need with rounding (or other forms of arithmetic/math) again, use this:

thats the rounding one, but if you just click the top left, it shows you all the calculators you may need!

3x + 4y -25 =0 represents the amount of change sianna should recieve