Question

Which equation is a quadratic equation?
−2.5
y + 2x = −2x(4 − 3x) + 4
6x3 + y = (2x − 2)(3x + 7)
9x − y = (3x2 + 1)(5x − 1) + 4x

Answer 1

the one with a degree 2 :D

Answer 2

the ist equation there

Answer 3

first

Answer 4

try multiplying them, then whichever has a degree of 2 is the quadratic eq

Answer 5

multiply add then simplify

Answer 6

the one after -2.5 is quadratic

Answer 7

yes the one after -2.5