Question

Which of the following is a quadratic function? Answer

y = x2 – 20

y = x3 – 25x

y = x4 + 13x

y = x – 49

Answer 1

general form of quadractic eq is ax^2 + bx + c

Answer 2

ax^2

Answer 3

ax^2 + bx + c=0

Answer 4

added by bx+c

Answer 5

it should be of degree 2

Answer 6

so it is y = x2 – 20

Answer 7

hence the ans y = x2 – 20

Answer 8

steps
ax^2 + bx + c=0

Answer 9

it is a general quadilatric equation