Question

Which equation is a quadratic equation?

y + 7 = −3x(4 − x) + 9x

y = −2x + 5

y + 2x3 = (2x − 2)(x + 5)

y − 9x = (x2 + 1)(5x − 1) + 3

Answer 1

option 1

Answer 2

Thank you:)

Answer 3

i think it is a bit bizzarre to call
\[y=x^2+3x+1\] a "quadratic equation"
what does that make
\[x^2+3x+1=0\]?

Answer 4

83 and counting...

Answer 5

its really a quadratic function

Answer 6

well i guess it is function if you write it as one. maybe a quadratic polynomial? not sure, but it is confusing when one word (or in this case two, quadratic equation) is used to mean two different things.

Answer 7

yes i agree