Question 417682
1. 2n^2+5n-42

= 2n^2+12n - 7n -42 

= 2n(n+6) -7(n+6)

= (2n-7) (n+6)




2. 5x^2+35x+30 

= 5x^2+30x+ 5x+30 

= 5x(x+6) + 5(x+6)

= (5x+5)(x+6)