Question

a rectangle has length 3 cm greater than its width.it has an area of 28cm squared,find the dimensions of the rectangle

Answer 1

Let w be the width
And let h be the length
h = w + 3

w * h = 28
w(w+3) = 28
w^2 + 3w = 28
Use a calculator (or use the quadratic formula) to get w=4

To find h, just add w by 3.
You get 7.

The dimensions of the rectangle is 4 by 7 cm.

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