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BMI229

  • one year ago

(x – 3)2 = 2

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  1. Hope_nicole
    • one year ago
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    distribute the 2 so it would be|dw:1366645202678:dw|

  2. Hope_nicole
    • one year ago
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    or are you saying its ^2 not 2

  3. BMI229
    • one year ago
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    |dw:1366645220762:dw| ^2 <-

  4. Hope_nicole
    • one year ago
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    ahh, well that just means that you are doing (x-3)(x-3)=2

  5. BMI229
    • one year ago
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    I got this x = 3 ± sqrt 2

  6. BMI229
    • one year ago
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    :) or :(

  7. Hope_nicole
    • one year ago
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    how did you get that? im not knocking whether it is right or wrong i just wanna know how you did it

  8. BMI229
    • one year ago
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    x2^-6x+9=2 x=3+-sqrt2

  9. BMI229
    • one year ago
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    new problem now?

  10. BMI229
    • one year ago
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    Sam’s plasma TV has a 14 in by 18 in screen with a plastic trim border. The total area of the TV and border is 480 in2. How wide is the trim around the TV?

  11. Hope_nicole
    • one year ago
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    good.

  12. Hope_nicole
    • one year ago
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    how would you go about your new problem?

  13. BMI229
    • one year ago
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    w = width of border (14 + w)(18 + w) = 480 252 + 32w + w^2 = 480 w^2 + 32w - 228 = 0 ( w + 38)(w - 6) = 0 so w = -38 (impossible) or w = 6 6 in

  14. Hope_nicole
    • one year ago
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    there you go :)

  15. BMI229
    • one year ago
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    Part 1: Solve the following equation using one of the methods listed below. Show all work. (4 points) Part 2: Using complete sentences, explain why you chose the method you used. (2 points) Equation: 0 = x2 + 6x + 3

  16. Hope_nicole
    • one year ago
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    okay, how would you solve it?

  17. BMI229
    • one year ago
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    x²+6x+3=0 x² +6x +9 +3 =9 (Add the square of 1/2 the coefficient of x to both sides.) x²+6x +9 = 6 (Simplify) (x+3)²=6 (Write the trinomial as a perfect square. x+3 = ±√6 (Take the square root of both sides.) x=-3 ±√6 (Simplify) I choose completing the square because it requires less arithmetic than the other common method of using the quadratic formula. Graphing would not produce an accurate answer and since it cannot be factored into whole numbers, that method is not desirable.

  18. Hope_nicole
    • one year ago
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    haha you get this stuff :) why are you asking for help

  19. BMI229
    • one year ago
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    just some were difficult thats all

  20. Hope_nicole
    • one year ago
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    ahh well you seem to me you are gonna get an A :D

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