Answer:
2nd, 4th and 5th
Step-by-step explanation:
remember :
+- = -
-+ = -
-- = +
++ = +
so, the first option has all signs of all terms as +. that is wrong, as we have -1 1/5
also the third option turns all signs to +. and is therefore wrong.
the second option makes the signs +, + and -. that is correct (like the original expression). as +- = -
the fourth option is just removing the brackets, which did not change anything about the signs, as there was a + in front of the original brackets. so, it is still the correct +, + and -.
the fifth option has the first two terms with -- signs, which makes them both +.
and the third one is +-, so it is -.
so, we end up again with the correct +, + and - signs.
