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anonymous

  • one year ago

Easy question.... Why is (a+b)^2 not equal to a^2+b^2? And why is the first one greater?

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  1. anonymous
    • one year ago
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    |dw:1442946857375:dw|

  2. anonymous
    • one year ago
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    NO CLUE

  3. anonymous
    • one year ago
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    we know that ,[\(a+b)^{2} = a ^{2}+2ab+b ^{2} \] now we can see that \[a ^{2}+2ab+b ^{2} is definitely greater than the a ^{2}+b ^{2} .\] Becuz it has extra value that is "2ab " .

  4. anonymous
    • one year ago
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    but when you expand it out dont you also get the 2ab for the second one?

  5. anonymous
    • one year ago
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    yeah! you r right . Thant's why the 1st one is greater . It has a^2 and B^2 also with 2ab . But the 2nd one only have a^2 and B^2 but no 2ab

  6. anonymous
    • one year ago
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    yea but I'm saying when you expand out |dw:1442947717914:dw|

  7. anonymous
    • one year ago
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    then ?

  8. anonymous
    • one year ago
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    so it makes it equal no?

  9. anonymous
    • one year ago
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    |dw:1442947937856:dw|

  10. anonymous
    • one year ago
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    |dw:1442948254617:dw|

  11. anonymous
    • one year ago
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    got this ?

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spraguer (Moderator)
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