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$(x+2 t)(x-5 t)$
$=(x)^{2}+(2 t-5 t) x+(2 t)(-5 t)$
$=x^{2}-3 x t-10 t^{2}$
Write whether the following statements are True or False. Justify your answer.
$\frac{1}{\sqrt{5}} x^{\frac{1}{2}}+1$ is a polynomial
Evaluate the following using suitable identities
$(105)^{3}$
If $x+y=12$ and $x y=27,$ find the value of $x^{3}+y^{3}$
$\left(\frac{2 x}{3}+\frac{3 y}{4}\right)^{2}$
If $p(x)=x+3,$ then $p(x)+p(-x)$ is equal to
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