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anonymous

  • 4 years ago

Find the area of the circle in simplest polynomial form. A = 3.14r2

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  1. anonymous
    • 4 years ago
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    A = pi (r)^2

  2. anonymous
    • 4 years ago
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    |dw:1327774538998:dw|

  3. anonymous
    • 4 years ago
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    A. 6.28x2 + 3.14 B. 12.56x2 + 3.14> C. 6.28x2 + 3.14x + 3.14 D. 12.56x2 + 12.56x + 3.14

  4. Mertsj
    • 4 years ago
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    Which one do you think?

  5. anonymous
    • 4 years ago
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    i think b?

  6. Mertsj
    • 4 years ago
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    Well, first we have to square the radius. So what is (2x+1)(2x+1)?

  7. anonymous
    • 4 years ago
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    4x^+4x+1

  8. nikita2
    • 4 years ago
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    \[\pi*r^2\] the formula

  9. Mertsj
    • 4 years ago
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    Yes. 4x^2+4x+1 Good for you.

  10. anonymous
    • 4 years ago
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    4x^2 i mean

  11. Mertsj
    • 4 years ago
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    Oh I see that nikita wants to help you now. good bye

  12. anonymous
    • 4 years ago
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    so wat one would it be

  13. phi
    • 4 years ago
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    why do you give up so quickly? you start with A = 3.14r^2 you know r= (2x+1), and you figured out r*r = (2x+1)*(2x+1)= 4x^2+4x+1 so use your result in A= 3.14*( 4x^2+4x+1) this means multiply the 3.14 times each term inside the parentheses A= 3.14*4 x^2 + 3.14*4 x + 3.14*1 even if you left your calculator in the refrigerator when you went looking for the yogurt, you see that the answer has 3 terms which makes A and B wrong. And what ever 3.14*4 is, it's the same number in front of x^2 and x

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