Question

Write a quadratic equation to represent the situation. Solve the equation by factoring. Use the table and graphing method to check. NEED QUADRATIC EQUATION! A rectangular poster has an area of 190 square inches. The height of the poster is 1 inch less than twice its width. Find the dimensions of the poster.

Answer 1

L * W = area

L * W = 190

L + 1 = 2W

Therefore, L = 2W - 1

The easiest way to do this is to find the factors, and then see what fits.

Explanation:

Factors of 190 = {190,1}, {95,2}, {5,38}, {19,10}

In which of these pairs is one number "twice as much less one" than the other?

The solution is 19,10. 19*10 = 190 square feet. The length (19) is twice the width (10) minus one.