Question

- 16m^2n-(-25m^2n)+(-7m^2n)Which of the following is equivalent to the expression above?

Answer 1

At first, let us revise the rule of signs

(+)(+) = (+)

(-)(-) = (+)

(+)(-) = (-)

`-(-25m^2n)=25m^2n`
`+(-7m^2n)=-7m^2n`

Now let us write the expression

`-16m^2n+25m^2n-7m^2n=`

We will add the coefficient of them because they are like terms

-16 + 25 - 7 = 2

So the answer is

`2m^2n`

The answer is the first choice