Begin with multiplying 6x(x - 1) this equals 6x^{2} - 6x

combine the product 6x^{2} - 6x with = 21 - x

this will lead to 6x^{2} - 6x = 21 - x

rearrange as per like terms and exponents to give balance the equation....

6x^{2} - 6x **- 21**
+ x = 21 **- 21** - x
+ x ( this... 21 - 21 - x + x = zero )

rearrange due to like terms

6x^{2} - 6x - 21 + x ----> 6x^{2} - 6x + x - 21 or 6x^{2} - 3x - 21

Now...use the F O I L method to factor:

F(First) .....factors of 6x^{2} are 1, 2, 3, 6, and x^{2}, and x

O(Outer)

I(Inner)

L(Last) ....factors of -21 are 1, -1, 3, -3, 7, -7, 21, and -21

okay....there are the tools...I've laid them out for you...work it out so you can practice and

know how to solve these problems... your answer will look something like....

( + ) ( - ) with the factors in the parenthesis...you work it out...

I have the answer...but want you to work it yourself

go to it...email me it you need further assistance