Question

complete the square: 20=x^2-8x

Answer 1

Hoot! You just asked your first question! Hang tight while I find people to answer it for you. You can thank people who give you good answers by clicking the 'Good Answer' button on the right!

Answer 2

easiest way to complete a square

Answer 3

x=10,-2

Answer 4

Add half of the b constant, squared.

Answer 5

take a b term ( that's the one with 'x') divide by 2 and square it
in your case
-8x ----> (-8/2)^2

Answer 6

Remember what you add on one side, you also have to do same on other side

Answer 7

I know, but that is factoring. I have to complete the square.

Answer 8

oh nvm

Answer 9

use this http://www.purplemath.com/modules/sqrquad.htm to show you how to complete the square

Answer 10

So you gotx^2-8x-20 right?

So you do the (-8/2)^2 which is (-4^2) which is 16.

-20+16=-4.

So, te final is x^2-8x-4.