### Chap 2: Real Numbers - Spot the Common Mistakes (II)

Revision Exercise 2 (p52 of Textbook) No. 7(b)

1. [-2+(-7)]^3
=[-9]^3
=[(-9) x (-9) x(-9)]
=729

2. [-2+(-7)]^3
=(-9)^3
=729

3. -9X-9X-9=-729

4. [ -2 + (-7) ]^3
= (-9)^3
= -729

chengngee

5. [-2+(-7)]^3
=-9^3
=729

6. This comment has been removed by the author.

7. [-2+(-7)]^3
=(-9)^3
=-729

8. [-2+(-7)]^3
=(-9)^3
=-729

9. [-2+(-7)]³
=(-9)³
=(-729)

10. [-2+(-7)]^3
= (-9)^3
= (-729)

JJ(:

11. (-2+(-7))³
=(-9)³
=(-729)

12. [-2+(-7)] ^3
=(-2)-7 ^3
=(-9) ^3
= [(-9)x(-9)x(-9)]
= 81x(-9)
= -729

13. [-2+(-7)]^3
=(-9)^3
=-729

14. [-2 + (-7)]^3
=(-9)^3
=729

15. [-2+(-7)]^3
=(-9)^3
=(-9) x (-9) x (-9)
=81 x (-9)
=(-729)

16. This comment has been removed by the author.

17. (-2+(-7))^3
=(-2-7)^3
=(-9)^3
=(-9) x (-9) x (-9)
=81 x (-9)
=(-729)(ans)

18. This comment has been removed by the author.

19. (-2)+(-7)=-9
(-9)x(-9)x(-9)=(-729)

20. [-2+(-7)]^3
=(-9)^3
=(-729)

21. [-2+(-7)]^3
=(-9)^3
=(-9)x(-9)x(-9)
=(-729)

22. [-2+(-7)]^3
=(-9)^3
=-729

23. Well done :D
All of you know that we'll operate what's inside the bracket before tackling the power (since the power is attached to the bracket).

A few areas to note when presenting your solution: