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anonymous

  • one year ago

How do you solve a problem like this? (-5x)(2x^2 - 3) - 4x

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  1. anonymous
    • one year ago
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    Are you trying to simplify?

  2. anonymous
    • one year ago
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    if you have to simplify then this would be a great help https://mathway.com/

  3. anonymous
    • one year ago
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    @DNTU4GETBOUTME Yes.

  4. anonymous
    • one year ago
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    First you apply the distributive property. Do you know how to do that?

  5. anonymous
    • one year ago
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    Yes; am I distributing the -4x?

  6. anonymous
    • one year ago
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    The - 5x should be taking out of the parenthesis You're going to take (2x^2-3) and seperate it. All and all you should end up with this −5x(2x^2)−5x(−3)−4x

  7. anonymous
    • one year ago
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    Does that make sense?

  8. anonymous
    • one year ago
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    I'm bad at explaining things. Moving on, next you should multiply x by x^2 to get x^3.

  9. anonymous
    • one year ago
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    That turns into −5(2x3)−5x(−3)−4x . Next we're going to simplify −5x(−3). What do you get after doing that?

  10. anonymous
    • one year ago
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    Multiply -5x by -3 to get 15x?

  11. anonymous
    • one year ago
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    Correct! So now we have −5(2x3)+15x−4x

  12. anonymous
    • one year ago
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    Next simplify −5(2x^3). You're doing really good :)

  13. anonymous
    • one year ago
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    If you multiply -5 by 2x^3, you'll get -10x^3 right?

  14. anonymous
    • one year ago
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    Yep! Now we have −10x^3+15x−4x. All we have to do now is add 15x and −4x.. which gives us?

  15. anonymous
    • one year ago
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    11x.

  16. anonymous
    • one year ago
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    Correct! So the answer is −10x^3+11x

  17. anonymous
    • one year ago
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    Thank you very much for your help! Do you have time to help me with one more?

  18. anonymous
    • one year ago
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    Sure!

  19. anonymous
    • one year ago
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    4m - 3m(5m - 6)

  20. anonymous
    • one year ago
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    Okay just like the first problem we're going to start by applying the distributive properties.

  21. anonymous
    • one year ago
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    We're going to move the 5m and the -6 keeping them in their parenthesis. Do you know where to move them to?

  22. anonymous
    • one year ago
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    To move them(after seperating them from each other, we're going to double a term. Just like the last problem

  23. anonymous
    • one year ago
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    I'm sorry, I'm confused; where do we move them?

  24. anonymous
    • one year ago
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    We're going to take negative 3 and add them there to get 4m−3m(5m)−3m(−6)

  25. anonymous
    • one year ago
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    Next we're multipling m by m to get m^2. which simply changes our work to 4m−3(5m^2)−3m(−6)

  26. anonymous
    • one year ago
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    Now we're going to simplify the last term −3m(−6)

  27. anonymous
    • one year ago
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    that's 18m, right?

  28. anonymous
    • one year ago
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    Correct! 4m−3(5m^2)+18m Now we simplify −3(5m^2)

  29. anonymous
    • one year ago
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    -15m^2

  30. anonymous
    • one year ago
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    Yep! We now have 4m−15m^2+18m

  31. anonymous
    • one year ago
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    Now we add 4m and 18m together and get?

  32. anonymous
    • one year ago
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    22m

  33. anonymous
    • one year ago
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    But i'm a bit confused, aren't you supposed to add the 4m and -15m^2 together?

  34. anonymous
    • one year ago
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    Correct! Great job! Our answer is −15m^2+22m

  35. anonymous
    • one year ago
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    thank you again!

  36. anonymous
    • one year ago
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    You're very welcome. Now you see how easy simplifying can be. I'm glad I could help

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