Can someone help me with this special product? (x + 5)^2 I know I set it up as (x + 5) (x+5) and use FOIL. But so far I just have x^2, im just confused on combining x and 5 because it wouldnt be 5x right?
yes. you should get \(5x\) twice, once from "outer" and once from "inner"
btw it is not really "combining" it is "multiplying" because that is what you are doing when you multiply these two \(5x\) means \(5\times x\)
Okay, thank you!
so would it be x^2 + 5x + 5x + 10?
yes
now is when you "combine"
but if I combined the 5x's to 10x^2?
ok i made a mistake
it is multiply, multiply, multiply, multiply not multiply, multiply, multiply, add
\[x^2+5x+5x+5\times 5\] \[x^2+5x+5x+25\]
now what is \(5x+5x\)? like $5 + $5
oh okay! but then I combine the 5x's right?
five dollars plus five dollars is ten dollars, and \(5x+5x=10x\)
not \(10x^2\) when you add, you do not change the exponents
okay, thank you very much!
@chungerforever you got that? final answer should be \[x^2+10x+25\]
with a little practice you will see that \((a+b)^2=a^2+2ab+b^2\) and will skip "foiling" so for example \[(x+6)^2=x^2+12x+36\]
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