What's Wrong? Q9c

23 comments:

  1. Instead of multiplying the 3 by itself, the person added instead.

    ReplyDelete
  2. Again, this is me (Haiyo, so embarrassing*auntie lucy action*)
    Err... Careless. 3X3 shld be 9 instead of 6. Careless agn. >.<

    ReplyDelete
  3. -3x-3=9 not 6

    ReplyDelete
  4. calculation mistake, -3 x -3=9, not 6

    ReplyDelete
  5. Careless?
    -3y x -3y= 9y^2 (not 6y^2)

    ReplyDelete
  6. 3 x -3 is -9 not 6

    ReplyDelete
  7. 3X3 equals 9 not 6 the person may have took it as a plus

    ReplyDelete
  8. The student calculated wrongly. -3y X -3y is equal to 9y^2 not 6y^2

    ReplyDelete
  9. This was a calculation error

    ReplyDelete
  10. There was a calculation mistake in the equation, (-3y)(-3y) is 9y^2 and not 6y^2 and why was there an underline for the expressions in the (6xy^2-9y^2)? Did not simplify?

    ReplyDelete
  11. -3 * -3 is 9 and not 6. (and not -9)

    ReplyDelete
  12. The student has done his/her calculating wrongly :(

    ReplyDelete
  13. The student probably never include a bracket around -3 in the calculator.

    ReplyDelete