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Select all of the following that are quadratic equations. 3x 2 + 5x - 7 = 0 x 3 - 2x 2 + 1 = 0 2x - 1 = 0 5x 2+ 15x = 0 6x - 1 = 4x + 7 x 2 - 4x = 4x + 7

Caroline Campbell

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Kathy Robinson on November 3, 2018

(a) 3x 2 + 5x - 7 = 0 b) x 3 - 2x 2 + 1 = 0 c) 2x - 1 = 0 d) 5x 2+ 15x = 0 (e) 6x - 1 = 4x + 7 f) x 2 - 4x = 4x + 7 (a) to (d) and (f) are quadratic equations


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