Find the area of the circle with the given diameter. Use 3.14 for π. Round to two decimal places.
2 answers:
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Let x represent the number.
.. x^2 +x = 2
.. x^2 +x +1/4 = 9/4 . . . . add 1/4 to complete the square
.. x +1/2 = ±3/2 . . . . . . . .square root
.. x = -2, 1
Numbers meeting that requirement are -2 and 1.
.. x^2 +x = 2
.. x^2 +x +1/4 = 9/4 . . . . add 1/4 to complete the square
.. x +1/2 = ±3/2 . . . . . . . .square root
.. x = -2, 1
Numbers meeting that requirement are -2 and 1.
For a square: 
Solve for the length of a side by taking the square root of both sides:
Now we can substitute known values:
Solve for the length of a side by taking the square root of both sides:
Now we can substitute known values: