Question

Complete the square
1. x^2+9x+
2. x^2+22x+
3. x^2+30x+

Answer 1

what is the last term of the question?

Answer 2

I don't know... that's all it gives me

Answer 3

#3 should be x^2-30x instead though

Answer 4

ok lets do that first

Answer 5

takes only two steps
1) what is half of 30?

Answer 6

15

Answer 7

ok good
part 2) what is \(15^2\) ?

Answer 8

225

Answer 9

225

Answer 10

then that is your answer \(225\) and \[x^2-30x+225=(x-15)^2\]

Answer 11

so is a 20.25 and b 121?

Answer 12

b is 121 yes

Answer 13

and a is \(\frac{81}{4}\) which is probably what you wrote as a decimal

Answer 14

okay thank you! That helped a lot

Answer 15

yw, you have to say it is easy once you know what to do right? some people treat this completing the square as if it were rocket science, but it only takes two steps