Dr. Nermien Ismail American School Grade 7 Mathematics Department Q1 W7 CW Greatest Common Factor Factor the common factor out of each expression. 1. 20 x4 + 10 x2 2. 7 a b – 35 a2 b 3. 27 x2 y5 + 72 x3 y2 4. – 3 a2 b + 6 a3 b2 5. 8 x3 y2 + 4 x3 6. 5 x2 – 5 x3 + 15 x 7. 32 n9 + 24 n6 – 40 n5 8. 21 p6 – 30 p2 + 27 9. 2 a ( x – 1 ) – 3 ( x – 1 ) 10. 5 x ( a – 2 )2 + 2 ( a – 2 )2 11. ( x – 2 ) ( 3 x – 1 ) + x ( 3 x – 1 ) 12. z2 ( 2 x – 3 ) – z ( 2 x – 3 ) 13. s ( 2 x + 7 ) – 4 ( 2 x + 7 ) 14. 8 ( x2 – 3 ) – x ( x2 – 3 ) Page 1 of 1