Factorise $169 x^{2}-625$.

Write whether the statement is True or False. Justify your answer.
The degree of the sum of two polynomials each of degree $5$ is always $5$.

$\sqrt{2}$ is a polynomial of degree

Write the following cube in expanded form:
$(4x - 3y)^{3}$

Give possible expressions for the length and breadth of the rectangle whose area is given by $4 a^{2}+4 a-3$.

Factorise $49 x^{2}-42 x+9$.