Dragon1011 Dragon1011

23-07-2016
Mathematics

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The width w of a rectangular swimming pool is 7x2. The area A of the pool is 7x3 – 42x2. What is an expression for the length of the pool?

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Panoyin Panoyin

23-07-2016

  A = lw
7x³ - 42x² = l(7x²)
7x²(x) - 7x²(6) = l(7x²)
  7x²(x - 6) = l(7x²)
7x²   7x²
x - 6 = l

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