Question

HELP! Solve the equation using the Quadratic Formula.
x^2-8x+15=0

Answer 1

\[x=\frac{8\pm \sqrt{64-4(1)(15)}}{2}\]

Answer 2

Simplify

Answer 3

How would you go about doing that?

Answer 4

What is 64-4(1)(15)?

Answer 5

4...?

Answer 6

\[x=\frac{8\pm \sqrt{4}}{2}\]

Answer 7

What is the square root of 4?

Answer 8

2

Answer 9

So now you have:
\[x=\frac{8\pm2}{2}\]

Answer 10

What is 8 + 2

Answer 11

10 and then you would divide it? so 5 & then do the subtraction?

Answer 12

Yes

Answer 13

so 5 & 3?

Answer 14

That is correct.