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lamechildidc

  • one year ago

Can somebody please help me :/ Simplify (8j^3 – 10j^2 – 7) – (6j^3 – 10j^2 – j + 12). (I got the first one but I'm not sure) 2j^3 – 20j^2 – j + 5 2j^3 + j – 19 2j^3 – 20j^2 + j – 19 2j^3 – j + 5

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  1. lamechildidc
    • one year ago
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    @Preetha

  2. lamechildidc
    • one year ago
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    @Michele_Laino

  3. Michele_Laino
    • one year ago
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    here we have to sum similar terms, and we have to apply the distributive property of multiplication over addition , in order to cancel the parentheses, so we can rewrite your expression as below: \( (8j3 – 10j2 – 7) – (6j3 – 10j2 – j + 12)= 8j3-6j3 -10j2+10j2+j -7-12=...\)

  4. lamechildidc
    • one year ago
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    Okay i understand that and then i combined like terms and got the first answer

  5. Michele_Laino
    • one year ago
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    please, first combine like terms, and write what you get

  6. lamechildidc
    • one year ago
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    2j3-20j2+j+5

  7. Michele_Laino
    • one year ago
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    we have: \(-10j^2+10j^2=0\)

  8. Michele_Laino
    • one year ago
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    and \(-7-12=-19\)

  9. lamechildidc
    • one year ago
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    So it would be B then?

  10. Michele_Laino
    • one year ago
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    correct!

  11. lamechildidc
    • one year ago
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    Okay thank you I just got really confused because I know you have to switch the signs but idk lols thanks :)

  12. Michele_Laino
    • one year ago
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    :)

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