1. Which of the following is a quadratic equation?
A. 5x + 3x - 30 B.4x + 2x? -*0
C.X+4=0

2. Which of the following is the standard form of quadratic equations?
A. ax? + bx + c <0, where a, b, and care real numbers and a # 1
B. ax?+ bx + c > 0, where a, b, and care real numbers and a 0
C. ax+bx+c = 0, where a, b, and care real numbers and a * 1
D. ax2 + bx + c = 0, where a, b, and care real numbers and a 0

3. Which of the following is the quadratic term of 3x - 5x-4 = 0?
A. 3x?
B. -5x
C.-4