Evaluate
$205 \times 195$
$39758$
$39975$
$48974$
$93541$
Expand
$(2 a+3 b)(2 a-5 b)$
Write the coefficient of $x^{2}$ in the following polynomials
$5-7 x-3 x^{2}$
Find the zeroes of the polynomial in each of the following:
$p(x)=x-4$
$(2 a+3 b)^{2}$
$\pi x^{2}-\frac{22}{7} x+3.14$
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