How do I factorise out the negative?

The Question:
Factorise the following by factorising out the negative sign.

A) -8x -4

B) -4x -2

C) -10x -5y

Honest help will be greatly appreciated

Abe is a triangle. can you use the sss postulate or the sas postulate to prove triangle abc = triangle aed? by sss only neither apply both apply by sas only

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?