Question

solve the quadratic equation by completing the square...

X^2+11X-2=0

Answer 1

@Leong

Answer 2

@_greatmath7

Answer 3

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

Answer 4

no

Answer 5

\(\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?

Answer 6

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

Answer 7

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

Answer 8

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

Answer 9

or screen shot it for me

Answer 10

ok

Answer 11

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

Answer 12

thx for all the help guys but i solved it