The length of a rectangle is the sum of the width and 3. the area of rectangle is 28units. what is the width ,in units, of the rectangle

Question

area of rectangle is 28

 

Answer 1

Assuming you mean the Area is 28 square units

Then

L = w + 3

A = w(w + 3)

28 = w² + 3w

We can subtract 28 from both sides of the equation to obtain the Quadratic

w² + 3w - 28 = 0

Factoring to give

(w + 7)(w - 4) = 0

The width cannot be -7

w = 4

L = w + 3

L = 4 + 3 = 7

The width of the rectangle is 4 units and the length of the rectangle is 7 unites.

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