document.write( "Question 477844: Which of the following equations is a quadratic equation ?\r
\n" ); document.write( "\n" ); document.write( "a. y = x^2 + 4
\n" ); document.write( "b. y = 1/2x^2
\n" ); document.write( "c. y = 3x - 9
\n" ); document.write( "d. y = 3x^3
\n" ); document.write( "

Algebra.Com's Answer #327438 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Ans: a and b
\n" ); document.write( "==================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "
\n" );