LCM and HCF of Polynomials

Find the L.C.M. of the two expressions $a^2+7a-18, a^2+10a+9$ with the help of their H.C.F.
 

Find LCM $x^2-12x+35$  and $x^2-8x+7$?

Find the HCF  for the given polynomials $c^2-d^2, c(c-d)?$

Find the LCM and HCF of $t^2+3t-4, t^2+5t+4, t^2-1$.

Find the LCM and HCF of Polynomials given,

$4u^2-9v^2\text{ and} 2u^2-3uv$

The HCF of a pair of numbers is $6$ and LCM is $90$, one number is $12$, what is the other number?

Find the L.C.M. of $x^2{y}^2-x^2$ and $x{y}^2-2xy-3x$?

Find the Highest Common Factor of the polynomials $x^2-6x+9\text{ and} x^2-9$ ?

If simplified form of $\frac{2x}{3ab}-\frac{3b}{6ac}$ is $\frac{Pcx-Q{b}^2}{Rabc}$ then $P+Q+R=?$

$\mathrm{HCF}$ of expression $8a^2{b}^{2}c$ and $20a{b}^3{c}^2$ is :

Cotyledons are also called-