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miah

  • 2 years ago

Help ?

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  1. miah
    • 2 years ago
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  2. miah
    • 2 years ago
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    @SandeepReddy

  3. SandeepReddy
    • 2 years ago
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    what is (a+b)*(c+d) ?

  4. miah
    • 2 years ago
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    uhm ?

  5. SandeepReddy
    • 2 years ago
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    what is the result of ( a+b)*(c+d) ?

  6. tejadab268
    • 2 years ago
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    |dw:1363810206819:dw|

  7. miah
    • 2 years ago
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    something with a fraction

  8. SandeepReddy
    • 2 years ago
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    \[a*(b+c) = a*b+a*c \]

  9. SandeepReddy
    • 2 years ago
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    @tejadab268 No direct answers please, explain them instead!

  10. miah
    • 2 years ago
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    his answer wasnt even right

  11. SandeepReddy
    • 2 years ago
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    In the same way \[(a+b)*(c+d) = a*(c+d)+b*(c+d)\]

  12. SandeepReddy
    • 2 years ago
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    that is a*c+a*d+b*c+b*d

  13. tejadab268
    • 2 years ago
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    So be it.......

  14. SandeepReddy
    • 2 years ago
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    now for help1, help2 and help4 you can use above formulae that i hav given

  15. miah
    • 2 years ago
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    but Idk how to do it

  16. SandeepReddy
    • 2 years ago
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    |dw:1363810963051:dw||dw:1363811076093:dw|

  17. SandeepReddy
    • 2 years ago
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    GOt it ?@miah

  18. miah
    • 2 years ago
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    yes, kind of. I was going to chose that answer. so the second one ?

  19. tejadab268
    • 2 years ago
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    @SandeepReddy Good Explanation....... And I see I wasn't wrong ;) FOIL METHOD?

  20. miah
    • 2 years ago
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    sorry :P can you help with the second one ?

  21. SandeepReddy
    • 2 years ago
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    haha @tejadab268

  22. SandeepReddy
    • 2 years ago
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    Do it yourself @miah now u know how to do these kind of problem , give it a try! you can do it , its simple than we think!

  23. miah
    • 2 years ago
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    I still dont know how to do it

  24. SandeepReddy
    • 2 years ago
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    Remember \[(a+b)(a-b) = a^2 -b^2\]

  25. SandeepReddy
    • 2 years ago
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    Its very important as important as \[(a+b)^2 = a^2+2ab+b^2\]

  26. SandeepReddy
    • 2 years ago
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    |dw:1363812124287:dw|

  27. miah
    • 2 years ago
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    I got it right!

  28. SandeepReddy
    • 2 years ago
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    as for as rationalizing problem is concerned, multiply numerator and denominator with root 2

  29. SandeepReddy
    • 2 years ago
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    Now one problem left, can u do it urself?

  30. miah
    • 2 years ago
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    wait,.. no i didnt ?

  31. miah
    • 2 years ago
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    what answer choice is that ?

  32. miah
    • 2 years ago
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    wait. i did get it right (:

  33. miah
    • 2 years ago
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    I need help with the third one :o

  34. miah
    • 2 years ago
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    3√2/2

  35. SandeepReddy
    • 2 years ago
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    yes correct!

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