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OpenStudy (gahm8684):
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OpenStudy (gahm8684):
Which polynomial expression represents the area of the outermost square tile, shown below?
x2 + 6x + 6
x2 + 9x + 6
x2 + 6x + 9
x2 − 6x + 9
OpenStudy (gahm8684):
OpenStudy (campbell_st):
well the side length is x + 3
so the area is
\[A= (x + 3)(x +3)....or.....(x + 3)^2\]
just distribute..... its one of the lase 2 choices
OpenStudy (gahm8684):
can you explain me more i dont get it
OpenStudy (campbell_st):
well if you split it you get
A = x(x + 3) + 3(x + 3)
so distribute a dn 3... then collect like terms
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OpenStudy (asevilla5):
The area of a square is s 2 , where s is the length of a side.
This means the area of the given tile is (x+3) 2 . Expand the binomial.
OpenStudy (gahm8684):
so it would be (x+3)^2
OpenStudy (campbell_st):
oops distribute the x and the 3, then collect like terms
OpenStudy (campbell_st):
thats correct.... but you need to distribute
OpenStudy (asevilla5):
@gahm8684 yes
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OpenStudy (gahm8684):
what do you mean
OpenStudy (gahm8684):
wait whats the answer still confusing
OpenStudy (asevilla5):
distribute this (x+3)(x+3)
OpenStudy (gahm8684):
yea that would be (x+3)^2
OpenStudy (asevilla5):
I know but you need to distribute it to get the answer bud
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OpenStudy (gahm8684):
what does that mean:c!?
OpenStudy (gahm8684):
oohhh the answer is x^2+6x+9
OpenStudy (campbell_st):
split the 1st brackets to
A = x(x + 3) + 3(x + 3)
distribute this
OpenStudy (asevilla5):
|dw:1407619749436:dw|
OpenStudy (asevilla5):
@gahm8684 correct
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OpenStudy (gahm8684):
Thanks
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