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. 2x” + 3x (1-2x) + x (x + 1)
25. a”bla-b?)+ abº(4ab-2a?) - a*b (1-2)
26. 4st (s -1)-6s"(t-t?) - 3t? (2s? - s)+2st (s-t)​

Answer 1

Answer:

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