(4x+1)(4x+1)..... multiply.... I tried several times and don't get it

Question

anonymous · Answer

I followed the book's directions and all it did was confuse me

anonymous · Answer

you use the formula (a+b)(a+b) = (axa) +(axb)+(bxa)+(bxb) 
                                                   = a^2 + ab+ba +b^2
                                                    =a^2+b^2

anonymous · Answer

so for you question all you do is the same process 
(4x x 4x)+(4x x 1) +(1 x 4x) +(1 x 1)= 16x^2 +4x+4x+1
                                                          =16x^2 +8x +1

anonymous · Answer

multiply everything by everything :D its just distribution, i can draw you a nice picture if you want that makes it make sense

anonymous · Answer

so I write it out like this.... (4x4)+(4x1)+(1x4)+1x1) ???

anonymous · Answer

dont leave out your Xs...

anonymous · Answer

(4x x 4x)+(4x x 1) +(1 x 4x) +(1 x 1)= 16x^2 +4x+4x+1 =16x^2 +8x +1

anonymous · Answer

old school F.O.I.L. approach : )
F)irst 
O)uter
I)nner
L)ast

it may help when you're first learning distributive (i.e. multiplying each figure in the first equation with each in the second and then combining like terms)

jhonyy9 · Answer

you dont know formula (a+b)^2 =a^2 +2ab +b^2 ?  - so you need using this ...