HKDSE-MATH - 2014 - Paper 1 -

Ans: (a) $(a+1)(a-3)$ (b) $(a+1)(b^2+a-3)$

1. $\begin{arra

Ans: A
$\begin{array}{cl}
& u^2 – v^2 -5u + 5v \\

Ans: (a) $x^2(x+y-7)$ (b) $(x-1)(x+1)(x+y-7)$

1. $\begin{a

Ans: D
$\begin{array}{cl}
& (x+1)(x^2 + x +1) \\
= 

Ans: (a) $5(m-2n)$ (b) $(m+3n)(m-2n)$ (c) $(m-2n)(m+3n-5

Ans: D
$\begin{array}{cl}
& 16 – (2x-3y)^2 \\
=

Ans: (a) $(x-3y)(x-y)$ (b) $(x-3y)(x-y+11)$

1. $\begin{arr

Ans: A
$\begin{array}{cl}
& 3m^2 – 5mn +2n^2 +m

Ans: (a) $9r^2(r-2s)$ (b) $(r-2s)(3r+s)(3r-s)$

1. $\begin{

Ans: C
$\begin{array}{cl}
& h^2 -6h – 4k^2 -12k

Ans: (a) $(2m+3)(2m-3)$ (b) $n(2m-3)(m+5)$ (c) $(2m-3)(2

Ans: C
$\begin{array}{cl}
& (a-b)(a^2 +ab – b^

Ans: (a) $(\alpha + 3)(\alpha -2)$ (b) $\alpha^2(\alpha + 3

Ans: A
$\begin{array}{cl}
& (3a + 2b)(4a – 5b) &

Ans: (a) $(2x-y)(3x+2y)$ (b) $(2x-y)(4-3x-2y)$

1. $\begin{

Ans: D

$\begin{array}{cl}
& (u+v)(v-u)(u-1) \\
= �

Ans: (a) $(3c-1)^2$ (b) $(7c+d-1)(c+d+1)$

1. $\begin{array

Ans: D

$\begin{array}{cl}
& \alpha^2-\alpha-\beta

Ans: B

$\begin{array}{cl}
& 2x^2+xy-y^2+4x+4y \\
= &