Factorise the following quadratic polynomials by splitting the middle term
$15 x^{2}+7 x-2$
$(3 x+2)(5 x-1)$
Write the coefficient of $x^{2}$ in the following polynomials
$\pi x^{2}-\frac{22}{7} x+3.14$
Without actually calculating the cubes, find the value of each of the following
$(31)^{3}-(16)^{3}-(15)^{3}$
$85 \times 75=\ldots \ldots \ldots$
$7 x^{3}-11 x+24$
Find the value of the polynomial $x^{2}-7 x+12$ at.
$x=1$
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