Question

Which of the following is a quadratic
polynomial ?
x + 4
x3+ x
x3 + 2x + 6
x² + 5x + 4​

Answer 1

quadratic polynomial is. x^2 +5x+4

since given polynomial have two zeroes

x^2+5x+4

by splitting middle term method

x^2+5x+4

x^2+4x+1x+4

x(x+4) + 1(x+4)

(x+1)(x+4)