Question

Classify the following as linear, quadratic and cubic polynomials:

1) $x-x^3$

2) $y+y^2+4$

3) $1+x$
4) $x-xy$ [ 4 MARKS]

Answer 1

Concept: 0.5 Mark each
Application: 0.5 Mark each

1) $x-x^3$
Degree of this polynomial is 3 which means that it is a cubic polynomial.

2) $y+y^2+4$
Degree of this polynomial is 2 which means that it is a quadratic polynomial.

3) $1+x$
Degree of this polynomial is 1 which means that it is a linear polynomial.

4) $x-xy$
Degree of this polynomial is 2 which means that it is a quadratic polynomial.