# Thread: Solving second degree equations

1. ## Solving second degree equations

I´m solving the following second degree equations the wrong way ... I tried to solve the first one by dividing 4 on both sides:

1. 4x^2 = 8x

2. 8x = 2x^2

2. Originally Posted by Bluerabbits
I´m solving the following second degree equations the wrong way ... I tried to solve the first one by dividing 4 on both sides:

1. 4x^2 = 8x

2. 8x = 2x^2
Your way of solving the equation isn't wrong but incomplete:

4x^2 = 8x ===> x^2 = 2x ===> x^2 - 2x = 0 ===> x(x-2) = 0

A product equals zero if one factor equals zero: x = 0 0r x - 2 = 0

Solve for x.

Do the 2nd example similarly.

3. Originally Posted by Bluerabbits
I´m solving the following second degree equations the wrong way ... I tried to solve the first one by dividing 4 on both sides:

1. 4x^2 = 8x

2. 8x = 2x^2
Either use "completing the square" or the quadratic formula. Show us what you get.

-Dan