<em><u>Complete Question:</u></em>
The rectangular poster shown measures 2w-30 by w. The poster has an area of 5400 cm2. What is the value of w?
<em><u>Answer:</u></em>
The value of w is 60
<em><u>Solution:</u></em>
Given that,
The rectangular poster shown measures 2w-30 by w
Area = 5400 square centimeter
<em><u>The area of rectangle is given as:</u></em>
<em><u>Solve by quadratic formula</u></em>
<em><u>We have two solutions</u></em>
Ignore, negative value as width cannot be negative
Thus value of w is 60