Simplify by removing the parenthesis
-(+1)=

- 1

Step-by-step explanation:

Since there is a - 1 outside of parentheses, you're technically going to use the distributive property to get your answer.

Multiply everything inside the parentheses by - 1.

1 is the only thing inside so it becomes - 1 and the negative outside of the parentheses goes away, so you can remove the parentheses as there's nothing left to do.

If this question was   -(-1)    it would become + 1

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.