Classify the following polynomials as polynomials in one variable, two variables etc.
$x^{2}-2 x y+y^{2}+1$
$x^{2}-2 x y+y^{2}+1$ is a polynomial in three variable.
State whether each of the following statements is true or false
In polynomial $5 x^{3}-3 x^{2}+11 x-14,$ the coefficient of $x^{3}$ is $3.$
Factorise :
$2 x^{3}-3 x^{2}-17 x+30$
$84-2 r-2 r^{2}$
$x^{3}-6 x^{2}+11 x-6$
Evaluate the following using suitable identities
$(107)^{2}$
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