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