1
Q
how to factorise 9a^2 - 25?
A
(3x + 5)(3x-5)
2
Q
how to factorise x^2 + 2x+3x+6?
A
(x+2)(x+3)
3
Q
how to expand (x-4)^2?
A
x^2 -8x +16
4
Q
how to expand (x+2)(x-2)?
A
x^2 + 4
5
Q
how to factorise 4x^2 + 12x - 5x -15
A
4x(x+3) - 5(x+3)
(4x-5)(x+3)
6
Q
what is the expanded form of (a+b)(a-b)
A
a^2-b^2
7
Q
what is a perfect square?
A
the result of an integer multiplied by itself
8
Q
how to factorise 2x + 6 + 4
A
2(x+1)(x+2)
