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July 31, 2014

July 31, 2014

Posted by **mchawk** on Monday, October 27, 2008 at 9:18am.

pool is 2x - 1 meters, and the width is x + 2 meters. Write

a polynomial A(x) that represents the area. Find A(5).

I have the polynomial being:

A(x)=2x^2+3x

If I find A(5):

2*5^2+3*5

2*25+15

65 meters.

Is this right?

- Algebra -
**Reiny**, Monday, October 27, 2008 at 9:41amnot quite,

You left out the constant term after you expanded

A(x) = (2x-1)(x+2)

it should have been 2x^2 + 3x - 2

adjust A(5) accordingly

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