Quadratic Formulas - 10 questions
tried 6 times and failed epically. just don't get it.
1) When the sum of 5 and twice a positive number is subtracted from the square of the number, 0 results. Find the number.
2) 2/5x^2 -x+ 19/15 =0
3) .6x^2 = 1.2x +0.6
4) A rule for estimating the number of board feet of lumber that can be cut from a log depends on the diameter of the log. To find the diameter required to get 121 board ft of lumber, the equation (d-4/4)^2 = 121.
are both answers reasonable?
5) 9x^2 -7x -5=0
6) 5x^2 - 2x +13 = 18x +1
7) 6p^2 = -19p -3
8) 5x^2 = -20x

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9) I can do this one :)
10) 5x^2 = 3 +2x

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ax2 + bx +c = 0

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