Factor out 4x



Multiply 3 times -2, get -6
Think of two integers that when multiplied give -6,
yet when combined give -5.  If you think hard enough,
you'll come up with -6 and +1, because when multiplied
they give -6 and when combined they give -5.  So write
-5x as -6x+1x



Factor 3x out of the first two terms inside the parentheses:



Factor +1 out of the last two terms inside the parentheses: 



Factor (x-2) out of both terms in the big parentheses:



Drop the big parentheses:



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Try breaking up 42x² as 6x time 7x



Ignoring the sign of -5, try breaking up 5 as 5 times 1 or as 1 times 5

 or 

There is no way to put signs in to make FOIL word, but
there is for the second one.



Now you check by multiplying them out using FOIL or distributing.

Edwin