First you find the greatest conman factor which is 2
then simplify and multiply 2 by (c-1)(c+4)
after factor our answer
is 2(c-1)(c+4)
I think its EB.
Hope this helps!
The two triangles are similar. The proportion of the two sides therefore are the same. So 6:5 is the same as 20:6+x. You can calculate the 6+x side based on this and the last step is to simply subtract 6 from the side.