Factorise the following quadratic polynomials by splitting the middle term

$x^{2}+10 x+16$

Which of the following expressions are polynomials in one variable and which are not $?$ State reason for your answer. If the given expression is a polynomial, state whether it is a polynomial in one variable or not

$x^{2}-8 x+15$

Write the following cubes in expanded form

$(3 x+2 y)^{3}$

Classify the following as linear, quadratic or cubic polynomial

$35 x^{2}-16 x-12$

The degree of polynomial $5 x^{2}-7 x-11$ is..........

The zero of polynomial $p(x)=b x+m$ is $\ldots \ldots \ldots$