Question

Factorise the following expressions.
please help us ​

Answer 1

2) a² - ax = a(a - x)

3) 3a² - 9 = 3(a² - 3)

4) 5ax - 5a²x² = 5ax(1 - ax)

5) πR² - πr² = π(R² - r²)

6) 3ab² - 6a²b = 3ab(b -2a)

7) 10xy - 15x²y² = 5xy(2 - 3xy)

8)20x²y + 30xyz = 10xy(2x + 3z)

the rest will be done just like this. I'll just show you 20

20) 3x(a - b) -6y(a - b) = 3(x - 2y)(a - b)