Question

[9.01] Which equation is a quadratic equation?

y = −4(3x + 2)

y + 3x3 = (x − 2)(3x + 8)

y − 3 = (2x2 + 11)(x − 1) + 3x

y + 5x = −2x(4 − x) + 1

Answer 1

B,i think

Answer 2

The second is quadratic equation :)
y + 3x3 = (x − 2)(3x + 8)
y+9=3x^2-8x-6x+16
y=3x^2-14x+16-9
y=3x^2-14x+7
Quadratic equation means x^2-x+6=0(This is an example of quadratic equation)