(a) Monique solves the equation 15 x+5 x+8x as shown. She identified -5 and -3 as solution x+5 x2+8x x+5 Ste 1 -(x+5)=(x+5) +8x Step 2 -15-x2+8x Step 3 0=x+ 8x+15 Step 4 0 (x+5) (x+3) c Step 5 x+5= 0; x+3=0 Step 6 x=-5; x=-3 Monique's teacher tells her that she made an error somewhere. In which step did Monique first make her error? A Step 1 B Step 4 (C) Step 2