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jennaboo514 jennaboo514
  • 27-01-2017
  • Mathematics
Answered

What's the answer? I don't understand what it is askinh.

What s the answer? I don t understand what it is askinh. class=

Verified Answer :

noodles28 noodles28
  • 27-01-2017

Area = width X length
So you need to factorise the quadratic having X - 40 as a factor.
(X-40)(X-90) when multiplied out gives you the total area
This means the length is X-90

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