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My problem is that when we have a - sign like hust above does it count to a 1 which is minus or what. I really dont understand.Please give the answer like right now.



Whenever you come across a negative that's not immediately attached to a number or variable, you can safely put a 1 next to it to make it a -1. In your situation that -1 would the distributed in as John has shown below. 

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John R. | John R: Math, Science, and History TeacherJohn R: Math, Science, and History Teach...
4.6 4.6 (55 lesson ratings) (55)

When you have a negative sign before a parenthesis, it should be treated like a negative one (-1).

-(5x + 2) + 2(1 + 5x)            Given

-5x - 2 + 2 + 10x                  Distributive property (the numbers in the 1st parenthesis times -1)

-5x + 10x -2 + 2                   Commutative property

5x + 0                                 Simplify

5x                                       Identity property of addition


Luis A. | Physics / Advance Math / Spanish TutorPhysics / Advance Math / Spanish Tutor
5.0 5.0 (3 lesson ratings) (3)
-(5x+2)+2(1+5x) Math use compact notation and your question is about one of them. -(5x+2)= -1*(5x+2) = -1*5x+-1*2 = -5x-2 note that if we have -5x-2 you can factor a negative sign or a -1 out ant it convert in -(5x+2)so (-5x-2 = -1*(5x+2) = -(5x+2) ==================================================================== 2(1+5x) = 2+2*5x = 2+10x ==================================================================== then -(5x+2)+2(1+5x) ==> -5x-2+2+10x ==> (10x-5x) + (-2+2) ==> 5x
Amy K. | Score High! Patient Test Prep for Math, English, Reading, SciencesScore High! Patient Test Prep for Math, ...
4.7 4.7 (18 lesson ratings) (18)

Yes, it's like multiplying whatever follows by negative one.
Or, it's your permission to erase the parenthsis and just flip the sign of everything that was inside them.