For the polynomial $p(x),$ if $p(7)=0,$ then $\ldots$ is............ a factor of $p(x) .$
$7 x-1$
$7 x+1$
$x-7$
$x+7$
Expand the following:
$(3 a-5 b-c)^{2}$
Evaluate the following products without multiplying directly
$93 \times 95$
Factorise :
$x^{2}+9 x+18$
Factorise the following quadratic polynomials by splitting the middle term
$6 x^{2}+7 x-20$
Expand the following:
$\left(4-\frac{1}{3 x}\right)^{3}$