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19 August, 07:15

Find the product (2x+5) ^3. Write your answer in standard form

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  1. 19 August, 10:59
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    Formula for this case is

    (a+b) ∧3=a∧3+3a∧2b+3ab∧2+b∧3

    (2x+5) ∧3 = (2x) ∧3+3 * (2x) ∧2*5+3*2x*5∧2+5∧3=8 x∧3+3*4x∧2*5+3*2x*25+125=

    =8x∧3+60x∧2+150x+125

    Good luck!
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