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25 July, 21:06

Select all of the following that are quadratic equations.

3 x^2 + 5 x - 7 = 0

x^3 - 2 x^2 + 1 = 0

2 x - 1 = 0

5 x^2 + 15 x = 0

6 x - 1 = 4 x + 7

x^2 - 4 x = 4 x + 7

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  1. 26 July, 00:55
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    These are the quadratic equations

    x^2 - 4 x = 4 x + 7

    x^2 - 4 x = 4 x + 7

    x^3 - 2 x^2 + 1 = 0

    3 x^2 + 5 x - 7 = 0

    Step-by-step explanation:

    Equations that follow this formula (ax^2 + bx + c = 0) are considered as quadratic equations
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