Question

Which equation is a quadratic equation?

y + 3 = 5x + 10

y + 4x2 = (4x − 2)(x + 3)

y − 8x = (x2 + 1)(9x − 7)

y = 2x + 7x(x + 1)

Answer 1

y = 2x + 7x(x + 1)

Answer 2

quadratic equation: An equation whose term of highest degree is quadratic.

quadratic term: A term of degree two.

Answer 3

degree of a polynomial: The greatest of the degrees of its terms,
after it has been simplified

Answer 4

@harliedanielfrye why did you bump it up?
Are the definitions not enough??