Question

x² + 9 = 4x

I need to find the x-intercepts without graphing. (Math 3)
Please this is urgent!

Answer 1

Answer:

x^2 - 4x = - 9

Step-by-step explanation:

x^2 + 9 = 4x

You need to put it into standard form.

x^2 + 9 = 4x

      - 9     - 9

First, you subtract nine from both sides. Your equation will now look like this, as the nines cancelled out on the original side:

x^2 = 4x - 9

Now subtract 4x from both sides.

x^2 = 4x - 9

- 4x   -4x

It will now look like this:

x^2 - 4x = - 9

It is a bit strange, as this equation didn't have a y, but either if it was a typo or not, this is how you do it. Move all the variables to one side. Normally, if y was here, you would substitute y for 0, and solve for x. Either way, here's your equation, just plug in 0s where needed.