imnotarandomgirl imnotarandomgirl

24-05-2017
Mathematics

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Which of the following equations represents a quadratic function?
1.y(y + 4)(y - 6) = 0
2.(2x - 3)(4x + 5) = 10x
3.(3b)(5b – 7)(b + 8) = 0

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PHDFlopper PHDFlopper

24-05-2017

I think the answer is b or choice #2.

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n36reeves n36reeves

24-05-2017

The answer is choice two, a quadratic follows the form ax^2 + bx + c =0

If you expand choice two out you get 8x^2 - 12x -15 = 0
Where a = 8, b= -12 and c = -15

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