10
9
9 × 1 = 9
Multiplication
9x 1 is 12.
1x9 3x3 9x1
√9x1=3
a²-a = a(a-1)
To factorise is to find the numbers that divide into the original number by only using prime numbers. For example factorise 20 = 2 times 2 times 5
9x1=8+1
3 x 3
you do (245x)
to put into brackets