Question

solve the quadratic equation.

8x2 + 16x + 8 = 0

Answer 1

use quadratic formula, or you could factorise it

Answer 2

Factoring seems the easiest here.
Though I prefer the Quadratic formula:)

Answer 3

\[8x ^{2}+16x+8=0\]

Answer 4

I agree with jazy, factorising would be easier but it doesnt apply to every case. the quadratic formula can be used in any case. Do you know the quadratic formula?

Answer 5

\[x = -16 \pm \sqrt{16^2 - 4(8)(8)} \]all divided by 2(8)

Answer 6

This is how your equation would be set up.

Answer 7

SO let's solve whats inside the radical first:
What is 16 squared?

Answer 8

256

Answer 9

Ok now what is 4 * 8 * 8

Answer 10

256

Answer 11

Ok so when there is a zero under the radical you are going to have two identical rational solutions.

Answer 12

one sec

Answer 13

So -16 + or - 0 is still gonna give us -16 so let's divide that by 16.

Answer 14

And what do you get?