Mathematics, 23.10.2021 14:00 CAPEPOPPA

Select all of the following equation(s) that are quadratic in form. x4 – 6x2 – 27 = 03x4 = 2x2(x + 5)4 + 2x2 + 5 = 06(2x + 4)2 = (2x + 4) + 26x4 = -x2 + 58x4 + 2x2 – 4x = 0

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