How do I convert 3x^(2) - 20x - 7 = 0 into the form it was before distribution: ( ) ( ) = 0

Question

How do I convert

3
`x^(2)` - 20x - 7 = 0

into the form it was before distribution:

( ) ( ) = 0

Answer 1

`3x^2-20x-7=0\\ 3x^2+x-21x-7=0\\ x(3x+1)-7(3x+1)=0\\ (x-7)(3x+1)=0\\ x=7 \vee x=-(1)/(3)`