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hrcheerlove

  • 3 years ago

Multiply the polynomials: 1. (a + 3)(a - 2) 2. (x2 + 4)(x2 - 4) 3. (x2 + 3x + 1)(x2 + x + 2)

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  1. Outkast3r09
    • 3 years ago
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    use the distributive property \[a(b\pm c)=ab\pm ac\]

  2. Outkast3r09
    • 3 years ago
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    using this you take the first variable of the first and multiply it by the second parenthesis and same with the second variable/constant of the first \[a(a-2)+3(a-2)\]

  3. Outkast3r09
    • 3 years ago
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    what do you get when yo udo this?

  4. hrcheerlove
    • 3 years ago
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    So then i got: 2a-2a + 3a-6

  5. hrcheerlove
    • 3 years ago
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    But I dont think that is right lol

  6. hrcheerlove
    • 3 years ago
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    @Outkast3r09

  7. Outkast3r09
    • 3 years ago
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    everything but your first multiplication is correct \[a(a)\neq 2a\]

  8. Outkast3r09
    • 3 years ago
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    hint: when you have a number to a power you get this correct \[2^2=2*2\]

  9. Outkast3r09
    • 3 years ago
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    so \[a*a=?\]

  10. hrcheerlove
    • 3 years ago
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    uhhh 2 squared ???

  11. hrcheerlove
    • 3 years ago
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    @Outkast3r09

  12. Outkast3r09
    • 3 years ago
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    not quite so 2 is the base

  13. Outkast3r09
    • 3 years ago
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    in \[2^2\]

  14. Outkast3r09
    • 3 years ago
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    the power tells you how many times you multiply that base by itself

  15. Outkast3r09
    • 3 years ago
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    so \[2^3=2*2*2\] \[2^5=2*2*2*2*2\]

  16. Outkast3r09
    • 3 years ago
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    so in your case \[ a*a\] a is your base and the number of bases you multiply is your power

  17. Outkast3r09
    • 3 years ago
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    so \[a*a=a^2\]

  18. hrcheerlove
    • 3 years ago
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    I know how to do powers lol. I just dont know what \[a \times a\] is

  19. hrcheerlove
    • 3 years ago
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    oh okay lol

  20. some_someone
    • 3 years ago
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    |dw:1359943457681:dw|

  21. Outkast3r09
    • 3 years ago
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    I think it's just the variable thats giving you a tough time if it helps let a be whatever you want and then replace it back with a. For example i have \[a*a*a*a\] in your head think a=5 \[5*5*5*5=5^4\] replace 5 with a

  22. some_someone
    • 3 years ago
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    |dw:1359943594086:dw|

  23. Outkast3r09
    • 3 years ago
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    some someone let her do the last one

  24. hrcheerlove
    • 3 years ago
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    so would it be \[a ^{2}-5a -6\] ?

  25. Outkast3r09
    • 3 years ago
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    \[-2a+3a\] if you have 3 dollars and lost 2 dollars, how many do you have now =]

  26. hrcheerlove
    • 3 years ago
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    lol 1 dollar

  27. some_someone
    • 3 years ago
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    |dw:1359943710986:dw|

  28. some_someone
    • 3 years ago
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    |dw:1359943887804:dw|

  29. hrcheerlove
    • 3 years ago
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    Thank you thank you thank you @Outkast3r09 and @some_someone !!!!

  30. some_someone
    • 3 years ago
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    your welcome hope we could help you :)

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