PDF chapter test TRY NOW

Factorise the following by taking out the common factor:
 
1. \(18xy - 12yz =\)
 
2. \(9x^5y^3 + 6x^3y^2 - 18x^2y =\)
 
3. \(x(b - 2c) + y(b - 2c) =\)
 
4. \((ax + ay) + (bx + by) =\)
 
5. \(2x^2(4x - 1) - 4x + 1 =\)
Answer variants:
\((b - 2c)(x + y)\)
\(6y(3x - 2z)\)
\(6y(3x + 2z)\)
\(3x^2y(3x^3y^2 + 2xy - 6)\)
\(3x^2y(3x^3y^2 + 2xy + 6)\)
\((b + 2c)(x + y)\)