Which of the following expressions are polynomials in one variable and which are not ? State reasons for your answer. $x^{10}+y^{3}+t^{50}$
$x^{10}+y^{3}+t^{50}$
$\because$ Exponent of every variable is a whole number,
$x^{10}+y^{3}+t^{50}$ is a polynomial in $x$, $y$ and $t,$ ise. in three variables.
Factorise : $\frac{25}{4} x^{2}-\frac{y^{2}}{9}$
Verify whether the following are zeroes of the polynomial, indicated against them.
$p(x) = (x + 1) (x -2)$, $x = -\,1, \,2$
Factorise $x^{3}-23 x^{2}+142 x-120$
Factorise $4 x^{2}+y^{2}+z^{2}-4 x y-2 y z+4 x z$.
Evaluate using suitable identities : $(104)^{3}$