1+ x
2+2
3+3 window plus window

Find the missing factor. 7s2 + 25s + 12 = (s + 3)( ).

Alogical argument that is presented in graphical form using boxes and arrows is called?

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).