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FullHouseSquidy

  • one year ago

i will medal and fan you! 1.(–10x3 + 30x – 20) ÷ (–5x + 5) 2.(8m7 – 10m5) ÷ 2m3 3.(–6m9 – 6m8 – 16m6) ÷ (2m3) these kinds of questions confuse the heck out of me please help and explain(:

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  1. ajprincess
    • one year ago
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    is ur first question? .(–10x3 + 30x – 20) ÷ (–5x + 5) or else .(–10x2 + 30x – 20) ÷ (–5x + 5)?

  2. ajprincess
    • one year ago
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    @FullHouseSquidy

  3. FullHouseSquidy
    • one year ago
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    these are the questions. sorry i wrote them down wrong: (-10x^3+30x-20) / -5x+5 (8m^7 – 10m^5) ÷ 2m^3 (–6m^9 – 6m^8 – 16m^6) ÷ (2m^3)

  4. ajprincess
    • one year ago
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    Let us try to do the first question. Can u factorise (-10x^3+30x-20)?

  5. FullHouseSquidy
    • one year ago
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    no you cant

  6. ajprincess
    • one year ago
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    \(-10x^3+30x-20=-10x^3+3*10x-2*10\) do u see anything common to all three terms?

  7. FullHouseSquidy
    • one year ago
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    10

  8. ajprincess
    • one year ago
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    right:) when u factor it out what remains?

  9. FullHouseSquidy
    • one year ago
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    -2^3+3-2?

  10. FullHouseSquidy
    • one year ago
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    oh wait its -z^3+3-2

  11. ajprincess
    • one year ago
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    \(-10x^3+3*10x-2*10=10(-x^3+3x-2)\) getting it?

  12. FullHouseSquidy
    • one year ago
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    yeah i get that

  13. ajprincess
    • one year ago
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    good:) Can u factorise -5x+5?

  14. FullHouseSquidy
    • one year ago
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    -5(x+1)

  15. ajprincess
    • one year ago
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    -5x+5=-5(x-1)

  16. FullHouseSquidy
    • one year ago
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    oh ok

  17. ajprincess
    • one year ago
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    \[\frac{ -10x^3+30x-20 }{ -5x+5 }=\frac{ -10(x^3-3x+2) }{ -5(x-1) }=\frac{ -5*2( x^3-3x+2) }{ -5(x-1) }\] do u see anything common in both denominator and numerator?

  18. FullHouseSquidy
    • one year ago
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    the -5 and x?

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