GCSE Question help Watch

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lucasharrison
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#1
Report Thread starter 13 years ago
#1
hi people,
wondered if you could help me with a gcse question:
which of the following expressions could represent an area?

pieab+2pie^2 ab-ac/2 4a(ab+2) 2a(b+c)^2

im fine with everything else but this sort of question always confuses me
thanks
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Chewwy
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#2
Report 13 years ago
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just the second one, i think.

replace a, b & c with x, it clears things up a bit.
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lucasharrison
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#3
Report Thread starter 13 years ago
#3
thanks for the reply
why the second one though?>
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lucasharrison
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#4
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#4
also, how would 50/25x^6 further simplify to get to the form ax^b?
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Chewwy
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#5
Report 13 years ago
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(Original post by lucasharrison)
also, how would 50/25x^6 further simplify to get to the form ax^b?
50/25x^6 = 2/x^6 = 2x^(-6)
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Chewwy
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#6
Report 13 years ago
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(Original post by lucasharrison)
thanks for the reply
why the second one though?>
like i said, make a, b and c all equal x, it makes no difference.

pix^2 + 2pi^2 - here we have an area plus a constant. so we have a jumbled up thing which is nothing.

x^2 - (x^2)/2 - area - area = an area

4x^3 + 8x - volume + length is again a jumbled up thing

2x(x+x)^2 = length + length = length, squared = area, * length = volume.
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lucasharrison
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#7
Report Thread starter 13 years ago
#7
oh i see! thanks for that i think i understand now!
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