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OpenStudy (anonymous):
Find the area of the circle in simplest polynomial form. A = 3.14r^2 A. 6.28x^2 + 3.14 B. 12.56x^2 + 3.14 C. 6.28x^2 + 3.14x + 3.14 D. 12.56x^2 + 12.56x + 3.14
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OpenStudy (anonymous):
OpenStudy (mathstudent55):
Since you are given the formula for the area of a circle, just substitute r with 2x + 1. Then you need to square 2x + 1. You can use FOIL for that. (2x + 1)^2 = (2x + 1)(2x + 1) Then after FOIL, multiply every term by 3.14.
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