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shaqadry

  • 3 years ago

expand (2x+1)^3

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  1. ParthKohli
    • 3 years ago
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    Would you like to use the Binomial Theorem here?

  2. UnkleRhaukus
    • 3 years ago
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    \[(2x+1)^3=(2x+1)(2x+1)(2x+1)\]

  3. ParthKohli
    • 3 years ago
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    \[1(2x)^3(1)^0 +3(2x)^2(1)^1 + 3(2x)^1(1)^2 + 1(2x)^0(1)^3 \]

  4. ParthKohli
    • 3 years ago
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    @UnkleRhaukus is right, but who'd like to multiply that much? :P

  5. UnkleRhaukus
    • 3 years ago
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    \[=(4x^2+4x+1)(2x+1)\]

  6. ParthKohli
    • 3 years ago
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    \[\implies 2x(4x^2 + 4x + 1) + 1(4x^2 + 4x + 1)\]

  7. UnkleRhaukus
    • 3 years ago
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    easy

  8. mayankdevnani
    • 3 years ago
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    \[(2x +1)^3\]=\[(2x)^3+(1)^3+3xy(2x+1)\]

  9. mayankdevnani
    • 3 years ago
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    and then solve it @shaqadry

  10. Yahoo!
    • 3 years ago
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    (a+b)^3 = a^3 + 3a^2 b + 3a b^2 + b^3

  11. Yahoo!
    • 3 years ago
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    Or Use pascal Triangle to find its Coefficient

  12. shaqadry
    • 3 years ago
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    thank you everyone!

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