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motorcrossteamD21

  • 3 years ago

Factor 5a^3 + 15a^2 – 6a – 18 (a2 – 6)(5a + 3) (5a2 – 3)(a + 6) (5a2 – 6)(a + 3) (a2 + 6)(5a – 3)

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  1. bbnl1990
    • 3 years ago
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    ??

  2. motorcrossteamD21
    • 3 years ago
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    The stuff on the bottom is the choices for the answer. I need help on getting the answer, with someone factoring the problem.

  3. bbnl1990
    • 3 years ago
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    it's the 3rd one. Notice that it's the only one that will produce a (-6a) term. :)

  4. motorcrossteamD21
    • 3 years ago
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    Thank you:) Can you help with these other ones please? 18. The area of a rectangular barnyard is given by the trinomial 6x2 + 7x – 20. What are the possible dimensions of the barnyard? Use factoring. 2x – 5 and 3x + 4 –2x + 5 and –3x + 4 2x + 5 and 3x – 4 2x – 5 and 3x – 4 19. The area of a rectangular pool is given by the trinomial 2y2 + y – 3. What are the possible dimensions of the pool? Use factoring. (–y – 1) and (–2y – 3) (y – 1) and (2y + 3) (2y – 1) and (2y + 3) (2y + 1) and (y – 3) 20. A carpenter is putting a skylight in a roof. If the roof measures 10x + 9 by 7x + 7 and the skylight measures x + 5 by 3x + 3, what is the area of the remaining roof after the skylight is built? 67x2 + 115x + 48 73x2 + 151x + 78 70x2 + 133x + 63 3x2 + 18x + 15

  5. bbnl1990
    • 3 years ago
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    LOL. Alright im in the mood haha 18. c 19. b 20. you can do it!

  6. motorcrossteamD21
    • 3 years ago
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    Is it, c? Cause thats what I got when I worked it out.

  7. bbnl1990
    • 3 years ago
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    nope. the roof will will u a 70x^2 term, the skyline will give you a 3x^2 term, subtracting...

  8. motorcrossteamD21
    • 3 years ago
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    d?

  9. bbnl1990
    • 3 years ago
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    nope. its a. its Area(roof)-Area(skyline)

  10. motorcrossteamD21
    • 3 years ago
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    OH! I was working the opposite I think. I have one more question I need help with. A refrigerator has a volume given by the trinomial y3 + y2 – 56y. What are the possible dimensions of the refrigerator? Use factoring. y, y + 8, and y – 7 y, y – 8, and y + 7 y + 7, y + 7, and y – 7 y + 8, –y + 8, and –y + 7

  11. bbnl1990
    • 3 years ago
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    a. just a wild educated guess haha

  12. bbnl1990
    • 3 years ago
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    yeah. its a

  13. motorcrossteamD21
    • 3 years ago
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    Thank you so much! I give you a medal:)

  14. bbnl1990
    • 3 years ago
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    thanks! :)

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