HKCEE - 2006 - Paper 2 -

Ans: B
Let $2^pa^qb^rc^s$ be the third expression.

$\begin

Ans: B
$\begin{array}{rcl}
a^2+4a+4 & = & (a+2)

Ans: A
$\begin{array}{lllllllllll}
3x^4y^2z & = �

Ans: C
$\begin{array}{cl}
& \dfrac{1}{x^2 -2x +1} &#

Ans: $\dfrac{-13}{(4x-5)(1-6x)}$
$\begin{array}{cl}
&

Ans: C
$\begin{array}{lcccccccccc}
9a^2b & = &

Ans: A
$\begin{array}{cl}
& \dfrac{1}{3x + 7} –

Ans: $\dfrac{x}{(7x-6)(5x-4)}$
$\begin{array}{cl}
&am

Ans: A
$\begin{array}{rcl}
\dfrac{5}{4k+3} – \dfr

Ans: B

$\begin{array}{cl}
& \dfrac{6}{n-6} –

Ans: A

$\begin{array}{rcl}
\text{The $1$st expression} &

Ans: $\dfrac{17k}{(k-9)(5k+6)}$

$\begin{array}{cl}
&#

Ans: C

$\begin{array}{cl}
& \dfrac{2}{5-4x}-\dfra

Ans: D

Among the three expressions, the highest powers of $a