Question

Simplify each of the following:
20. a (b - c) + b(c-a)+c(a - b)
21. a(b-c) - b(c-a)-c(a - b)
22. 3x2 + 2(x + 2) - 3x (2x +1)
23. x(x + 4) + 3x (2x2 - 1) + 4x2 + 4
24. 2x2 + 3x (1 - 2x3) + x (x +1)
25. a'bla - b2) + ab? (4ab-2a) - aºb (1-2b)
26. 4st (s - t)-6s?(t - t2) - 3t² (2s2 - s) + 2st (s-t)​

Answer 1

Answer:

20.

Step-by-step explanation:

• ab-ac+bc-ba+ca-bc
• 0