1.	Which equation is in quadratic form?
		A.		B.	3x3 + 3x + 3 = 0
		C.		D.	x4 - x2 + x - 1 = 0
		Hint
	2.	Solve .
		A.	16	B.	-4, 2
		C.	4	D.	4, 16
		Hint
	3.	Write the expression in quadratic form.
		A.		B.
		C.	cannot be done, since	D.
		Hint
	4.	Solve x4 – 625 = 0
		A.		B.	5, 5i
		C.		D.
		Hint
	5.	Solve
		A.		B.
		C.	1, 1.22	D.	1, 11.31
		Hint