Using suitable identity, evaluate the following:
$999^{2}$
$990001$
$998001$
$999001$
$999999$
$(999)^{2}=(1000-1)^{2}=(1000)^{2}-2 \times(1000) \times 1+1^{2}$
$=100000-2000+1$
$=998001$
Expand
$(3 a-4)^{2}$
Zero of the zero polynomial is
Factorise the following quadratic polynomials by splitting the middle term
$6 x^{2}+7 x-20$
Factorise the following:
$4 x^{2}+20 x+25$
Write the coefficient of $x^{2}$ in the following polynomials
$\sqrt{3} x^{2}+11$
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