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 3 years ago
FOILing, do i multiply or add?
Like (2x+4)+(2x+4)
i add there, right? And
(2x+4)*(2x+4)
I multiply there, right?
 3 years ago
FOILing, do i multiply or add? Like (2x+4)+(2x+4) i add there, right? And (2x+4)*(2x+4) I multiply there, right?

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Inopeki
 3 years ago
Best ResponseYou've already chosen the best response.0I did that in class todya but i didnt get the right answer..

satellite73
 3 years ago
Best ResponseYou've already chosen the best response.3what did you get for the first one?

Inopeki
 3 years ago
Best ResponseYou've already chosen the best response.0(2x+4)+(2x+4) 4x+2x+4+4+2x+4+4 8x+16

satellite73
 3 years ago
Best ResponseYou've already chosen the best response.3it looks like you are multiplying and adding instead of adding. the parentheses here are unnecessary

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.0when it says to add, I would add. and when it says to multiply, id multiply. but thats just me set in my ways :)

satellite73
 3 years ago
Best ResponseYou've already chosen the best response.3\[(2x+4)+(2x+4)=2x+4+2x+4=2x+2x+4+4\]

satellite73
 3 years ago
Best ResponseYou've already chosen the best response.3let's imagine for a moment that x was ten (x is a variable, but it could be ten) then \[2x+4=2\times 10+4=24\] and \[24+24=48\]

Inopeki
 3 years ago
Best ResponseYou've already chosen the best response.0I thought it was like this dw:1327066387934:dw

satellite73
 3 years ago
Best ResponseYou've already chosen the best response.3multiplication distributes over addition. so if you had \[(2x+4)(2x+4)\] you would use the distributive law, just like if you had \[24\times 24\]

Tomas.A
 3 years ago
Best ResponseYou've already chosen the best response.0addition is commutative you can remove brackets when you have ONLY addition

satellite73
 3 years ago
Best ResponseYou've already chosen the best response.3but addition is the same as "combine like terms" just as you would with arithmetic 24 + 24 ______ 48 2x + 4 + 2x + 4 __________ 4x + 8

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.02x+4 (+) 2x+4  4x+ 8 2x+4 (x) 2x+4  8x+16 4xx+8x  4x^2+16x+16

Inopeki
 3 years ago
Best ResponseYou've already chosen the best response.0Why would it be 4x^2+16x+16?

satellite73
 3 years ago
Best ResponseYou've already chosen the best response.3@inopeki i was making an analogy. the work you do with variables is a generalization of the work you do in arithmetic, and if it doesn't work with arithmetic it certainly doesn't work with variables, because the variable could be a number, that is you could replace the variable by a number

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.0becasue thats what happens when you multiply stuff

Inopeki
 3 years ago
Best ResponseYou've already chosen the best response.0so basically just add them up?

Inopeki
 3 years ago
Best ResponseYou've already chosen the best response.02x+4 (+) 2x+4  4x+ 8

satellite73
 3 years ago
Best ResponseYou've already chosen the best response.3imagine your job was to add \[24+24\]\ what would you do? line them up and add

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.05+3 = 8 (x) 2+4 = 6  20+12 10+6  10+26+12 = 48

satellite73
 3 years ago
Best ResponseYou've already chosen the best response.3and similarly 2x + 4 + 2x + 4 __________ 4x + 8

Inopeki
 3 years ago
Best ResponseYou've already chosen the best response.0Oh! Give me another example?

Inopeki
 3 years ago
Best ResponseYou've already chosen the best response.0(3x+5) +(4x+1)  7x+6
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