Question

Simplify each of the following:
20. alb-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​

Answer 1

Answer:

-: Required answer:-

20. alb-c)+b(c-a) + c(a - b)

=ab - ac + bc - ab + ac- bc

=0

21. a(b-c)- b(c-a)-c(a - b)

= ab - ac - bc + ba -ac +cb

=2ab - 2ac

22. 3x2 + 2(x + 2) - 3x (2x +1)

= 6+ 2x + 4 -6x² - 3x

= -6x² -x +10

23. x(x + 4) + 3x (2x2 - 1) + 4x2 + 4

= x²+4x + 9x +8+4

= x² + 13x + 12

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