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anonymous

  • one year ago

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

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  1. anonymous
    • one year ago
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    @Leong

  2. anonymous
    • one year ago
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    @_greatmath7

  3. jdoe0001
    • one year ago
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    hmmm do you know what a "perfect square trinomial" is?

  4. anonymous
    • one year ago
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    no

  5. jdoe0001
    • one year ago
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    \(\begin{array}{cccccllllll} {\color{brown}{ a}}^2& + &2{\color{brown}{ a}}{\color{blue}{ b}}&+&{\color{blue}{ b}}^2\\ \downarrow && &&\downarrow \\ {\color{brown}{ a}}&& &&{\color{blue}{ b}}\\ &\to &({\color{brown}{ a}} + {\color{blue}{ b}})^2&\leftarrow \end{array}\qquad % perfect square trinomial, negative middle term \begin{array}{cccccllllll} {\color{brown}{ a}}^2& - &2{\color{brown}{ a}}{\color{blue}{ b}}&+&{\color{blue}{ b}}^2\\ \downarrow && &&\downarrow \\ {\color{brown}{ a}}&& &&{\color{blue}{ b}}\\ &\to &({\color{brown}{ a}} - {\color{blue}{ b}})^2&\leftarrow \end{array}\) does that ring a bell?

  6. anonymous
    • one year ago
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    er.... you want me to detail you the whole answer?

  7. anonymous
    • one year ago
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    i just need the answer its the last question on the final

  8. anonymous
    • one year ago
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    sr but i think you type wrong something, check it again

  9. anonymous
    • one year ago
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    or screen shot it for me

  10. anonymous
    • one year ago
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    ok

  11. anonymous
    • one year ago
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    i checked and i didnt make a mistake and im on a computer so i cant screen shot

  12. anonymous
    • one year ago
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    thx for all the help guys but i solved it

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spraguer (Moderator)
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is replying to Can someone tell me what button the professor is hitting...

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