Question 758
7x(squared)+9x+2
=7x(squared)+7x+2x+2            (write as 9x=7x+2x)
=7x(x+1)+2(x+1)                 7x(squared)+7x = 7x(x+1) , 2x+2=2(x+1)
=(x+1)(7x+2)                     take x+1 common from  7x(x+1)+2(x+1)

Answer 7x(squared)+9x+2 =(x+1)(7x+2)