algebra 7.6.1

© 2007 1 -2010 tutorco.com 1. Add the following:-a) 2x + 5x + 6y – 9y b) 9 – 6x² + 3y² + 8x² -5 c) 2p² + 5q – 3pq – 12q d) 6 -xy -yz + 2xy + 5yz – 8 e) 12x + 15x + 16y – 19y f) 3x + 2y – 5z , 2x – 5y + 2z 7/6/1/S TOPIC: ALGEBRA © 2007 2 -2010 tutorco.com g) 2a – 3b + 4c , a – b – 2c h) 2x – 3y + 4z , 5x + 2y – 5z i) 8x + 7xy + 5y , -6x – xy – 8y , -5x – 2xy + 3y 2. Subtract the following: a) 6a from -4a b) -4x from -2x © 2007 3 -2010 tutorco.com c) -7xy from 10xy d) 8x³ from 5x³ e) 12p² from 2p² f) 3xy from 8xy g) – 9ab from – 2ab h) – 5b from 8b © 2007 4 -2010 tutorco.com 3. Subtract the following : a) (3x + 2y – 5z) -(2x – 5y + 2z) b) (2a – 3b + 4c) -(a – b – 2c) c) (2x – 3y + 4z) -(5x + 2y – 5z) d) (8x + 7xy + 5y) -(-5x – 2xy + 3y) © 2007 5 -2010 tutorco.com 4. Subtract 3a + 4b + 2c from 8a + 13b + 7c 5. Subtract x – 3y – 4z from 2x – 5y + 2z 6. Subtract 2a – 3b + 4c from 4a – 6b –c 7. From the sum of x² + x + 1 and x² -x + 1 subtract -x² -x + 1. 8. Subtract 2x³ + 7x² + 3x – 9 from 0.