A community for students. Sign up today

Here's the question you clicked on:

anonymous one year ago solve the quadratic equation by completing the square... X^2+11X-2=0

• This Question is Open
1. anonymous

@Leong

2. anonymous

@_greatmath7

3. jdoe0001

hmmm do you know what a "perfect square trinomial" is?

4. anonymous

no

5. jdoe0001

$$\begin{array}{cccccllllll} {\color{brown}{ a}}^2& + &2{\color{brown}{ a}}{\color{blue}{ b}}&+&{\color{blue}{ b}}^2\\ \downarrow && &&\downarrow \\ {\color{brown}{ a}}&& &&{\color{blue}{ b}}\\ &\to &({\color{brown}{ a}} + {\color{blue}{ b}})^2&\leftarrow \end{array}\qquad % perfect square trinomial, negative middle term \begin{array}{cccccllllll} {\color{brown}{ a}}^2& - &2{\color{brown}{ a}}{\color{blue}{ b}}&+&{\color{blue}{ b}}^2\\ \downarrow && &&\downarrow \\ {\color{brown}{ a}}&& &&{\color{blue}{ b}}\\ &\to &({\color{brown}{ a}} - {\color{blue}{ b}})^2&\leftarrow \end{array}$$ does that ring a bell?

6. anonymous

er.... you want me to detail you the whole answer?

7. anonymous

i just need the answer its the last question on the final

8. anonymous

sr but i think you type wrong something, check it again

9. anonymous

or screen shot it for me

10. anonymous

ok

11. anonymous

i checked and i didnt make a mistake and im on a computer so i cant screen shot

12. anonymous

thx for all the help guys but i solved it

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy