Question 426661
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b>
Hi
simplifying by removing the parenthesis and combining Like terms
(7m^2-20)-(4m^2-4)   |both parenthesis in this example have a coefficient of 1
1*(7m^2-20)-1*(4m^2-4)
 7m^2 - 20 - 4m^2 + 4   |combining Like terms
   3m^2 - 16