Warmups Topics 8.7 One: Write the expression 3x24 + 4x12 + 7 in quadratic form. Two: Write the expression -5x4 – 10x2 + 6 in quadratic form. Solve the given equation. Three: 2x4 – 44x2 + 42 = 0 Four: 12x4 – 66x2 + 54 = 0 Answers (source)