Question

1)Which equation is a quadratic equation?

A) 5x − 2 = y

B) y + 15x2 = (3x − 2)(5x + 7)

C) y = 3x(5 − x) + 7

D) y + 2 = (3x2 + 10)(x − 1)

2) What is the value of the coefficient of "a" when the quadratic equation y = (3x + 1)(3x − 2) is written in standard form?

A)−2

B)−3

C)9

D)6

Answer 1

Hint: A quadratic equation must be able to form itself into this formula: y = Ax^2 + Bx + C.