Homework Help: math

Posted by LP on Monday, December 17, 2012 at 12:57pm.

Find the dimensions of a rectangle having an area of 10 square centimeters and whose width is 3 centimeters less that its length.

math - PsyDAG, Tuesday, December 18, 2012 at 1:09pm
Let x = length, then width = x-3.

Area = Length * Width

10 = x(x-3) = x^2 - 3x

x^2 -3x -10 = 0

(x-5)(x+2) = 0

Take it from here.

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