Classify the following as linear, quadratic and cubic polynomials :
$(i)$ $x^{2}+x$
$(ii)$ $x-x^{3}$
$(iii)$ $y+y^{2}+4$
Classify the following as linear, quadratic and cubic polynomials :
$(i)$ $x^{2}+x$
$(ii)$ $x-x^{3}$
$(iii)$ $y+y^{2}+4$
$(i)$ $x^{2}+x$
$\because $ The degree of $x ^{2}+ x$ is $2$ . $\therefore $ It is a quadratic polynomial.
$(ii)$ $x-x^{3}$
$\because$ The degree of $x-x^{3}$ is $3$. $\therefore$ It is a cubic polynomial.
$(iii)$ $y+y^{2}+4$
$\because$ The degree of $y+y^{2}+4$ is $2$ $\therefore$ It is a quadratic polynomial.
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