9x2-1=0
9x2=1
x2=1/9
x=+- 1/3
(3x-1)(3x+1)
Multiplication
9 × 1 = 9
9
√9x1=3
1x9 3x3 9x1
Factorise fully is when brackets are involved in the equation
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
3 x 3
9x1=8+1
to put into brackets
you do (245x)