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anonymous

  • 5 years ago

(x+1)(ax^2+bx+c) which is equal to ax^3 +(b+a)x^2+(c+b)x+c can someonw explain me me how that come about? thanks!

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  1. anonymous
    • 5 years ago
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    use the distributive property

  2. anonymous
    • 5 years ago
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    Multipy every thing through by x, multiply through by one. Add the two together.

  3. anonymous
    • 5 years ago
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    \[ax ^{3}+(ax ^{2}+bx ^{2})+(bx+cx)+c\]They skipped this step, factoring.

  4. anonymous
    • 5 years ago
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    oh i see and then they just factor the ( ) together or somthing

  5. anonymous
    • 5 years ago
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    Yes, they pull out b+a in the first bracket and c+b in the second.

  6. anonymous
    • 5 years ago
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    thanks

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