math

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the length of a rectangle is 1 cm less than twice its width. the area is 28 cm squared. find the dimensions of the rectangle.


Just translate the English into "math"

"the length of a rectangle is 1 cm less than twice its width"

l=2w-1

"the area is 28"

w(2w-1) = 28

solve as a quadratic.
Hint: it factors very nicely

  • math -

    width = 4
    length + 7

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