Evaluate
$(215)^{2}$
$44621$
$46225$
$46925$
$47159$
If $49 x^{2}-b=\left(7 x+\frac{1}{2}\right)\left(7 x-\frac{1}{2}\right),$ then the value of $b$ is
Without actually calculating the cubes, find the value of each of the following
$(0.2)^{3}-(0.3)^{3}+(0.1)^{3}$
Write the coefficients of $x^{2}$ in each of the following polynomials
$x^{3}+27$
If $x-2$ is a factor of $x^{3}-3 x^{2}+a x+24$ then $a=\ldots \ldots \ldots$
The following expressions are polynomials? Justify your answer:
$\frac{1}{2 x}$
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