Question

6. Simplify:
() ab(a - b) + b (a - 2b)
(i) - 6x (xy + 2y) - 3y2 (2x2 + y)
(ii) 2x(x - y) - 3y(xy + 2x) - xy(x + y)​

Answer 1

Step-by-step explanation:

(i) ab(a - b) + b (a - 2b)

= (a^2)b - a(b^2) + ab -2b^2

(ii) -6x (xy + 2y) - 3y^2 (2x^2 + y)

= -6(x^2)y - 12xy - 6 x^2 y^2 - 3y^3

(iii) 2x(x - y) - 3y(xy + 2x) - xy(x + y)

= 2x^2 - 2xy - 3xy^2 - 6xy - (x^2)y - xy^2