Question

Which equation is NOT a quadratic equation?
(Points : 1)

y = x2 + 6x - 5


y = 2x + 5


y = 2x2 + 5


y = 4x2

Answer 1

second

Answer 2

2nd one, because the highest power of x must be one in a quadratic equation

Answer 3

Quadratic equation is the equation which has 'x^2'
For the second one, since to highest degree of x is 1, it's not a quadratic. Instead, it's a linear equation.

Answer 4

thank you!