Mia is factoring the polynomial x2 + 4x – 12. she uses the steps shown. x^2+4x-12 step 1- x^2 + 6x - 2x - 12 step 2- (x^2 + 6x) - (2x - 12) step 3- x(x + 6) -2 (x+6) step 4- (x + 6) (x+2) in which step did mia make an error? a. step 1 b. step 2 c. step 3 d. step 4

statement #3: proof- ang is congruent to ang ecd : angles are congruent.  

step-by-step explanation:

1: the missing angles in statement #3  

a.) acb  

reason- the reason why the answer is acb is because angle ecd and angle acb are both the same size *that's what the word congruent means this is really simple.  

2: the missing word in reason #3  

c.) vertical  

reason- the reason why the answer is vertical is because the angles in that diagram on figure 2 is slanted, which is vertical, and the e and a both lay on vertical lines. along with the other's, but e and a are the 2 main points you want to focus on. and c is kind of like your starting point, because c is for both angles, not just one.  

i hope that was and understanding.