Question

Add :(2x+5y): (4x-8z) :(15z-2y)

Answer 1

Explanation:

= 2x +5y +4x -8z+15z-2y

= 2x+5x+4y -2y-8z +15z

= 6x+ 3y+7y

Answer 2

Answer:

example sum :3x + 7x = (3 + 7) x = 10x

(ii) -5xy + 9xy = (-5 + 9)xy = 4xy

Explanation:

7abc + (-5abc) + (9abc) + (-8abc)

= 7abc – 5abc + 9abc – 8abc

= (7 – 5 + 9 – 8)abc

= (16 – 13)abc

= 3abc

(ii) 2x2y +(-4x2y) + (6x2y) + (-5x2y)

= 2x2y - 4x2y + 6x2y - 5x2y

= (2- 4 + 6 - 5) x 2y

= (8 - 9) x 2y

= -x2y