Factorising Quadratics Flashcards
1
Q
Factorise X squared + 10x + 24
A
4 + 6 = 10
4 X 6 = 24
(X+4) (X+6)
2
Q
Factorise 4e + 6
A
3 X 2 = 6
2 (2e + 3)
Only use 1 bracket, find the highest common factor of both, times it to make the right number to find out the contents of the bracket
3
Q
Factorise a squared - 36
A
( a + 6) ( a - 6)
If the numbers squared one is going to be a + and one a -
4
Q
Expand (X+9)(X-3)
A
=X (X-3) 9 (X-3)
= X squared - 3x - 9x - 27
= X squared + 6x - 27
