The area of a rectangle is 63 sq m. The width is two meters shorter than the length. What is the width?  Choose the correct choice from the following choices
A) 9	B) 7	C) -9	D) 11	E) 6
a = l x w   w = l - 2   l = w + 2   a = (w + 2 ) x w   a = w^2 + 2 x w   63 (  + 2 )= 
<gadget id="calculator">(  + 2 )</gadget>
<output>2</output>
w^2 + 2 x w   63= w^2 + 2w   0 = w^2 + 2w - 63   0 = (w + 9)(w - 7)   w = -9 and w = 7, width cannot be negative so w = 7   Answer is 7
<result>B</result>
The area of a rectangle is 63 sq m. The width is two meters shorter than the length. What is the width?