Factorise
$x^{2}+9 y^{2}+4+6 x y+12 y+4 x$
$=(x)^{2}+(3 y)^{2}+(2)^{2}+2(x)(3 y)$ $+2(3 y)(2)+2(2)(x)$
$=(x+3 y+2)^{2}$
$=(x+3 y+2)(x+3 y+2)$
Write the degree of the following polynomials
$11-2 y^{2}$
Find the value of the polynomial $x^{2}-7 x+12$ at.
$x=3$
Verify whether the following are True or False:
$-3$ is a zero of $y^{2}+y-6.$
Expand
$(2 x+5 y)^{2}$
Which of the following expressions is a polynomial, state the reason ? If an expression is polynomial, state whether it is a polynomial in one variable or not
$5 x^{2}+11 x-2 \sqrt{x}$
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