2. Decomposition -36a? bc+48ab? Common factor to be extracted when c-24abc is (-12abc).
3. If m+n = 5 and Mn = 6, then m? n+mn? The value of is (30)
4. if x? +x+m=(x-n)? Then m = (1/4) and n = (- 1/2).
Don't answer the rest, just answer if you get extra points.