Question

The area of a poster board is (x^2+3x-10) square inches. Find the dimensions of the poster board if x=14

Answer 1

14^2+3*14-10=228in^2
if the poster board is given as a square you can find the sides by taking the square root of 228 to find that each side is about 15.1 inches long. 

Answer 2

The dimensions of the poster board is 12 inches by 19 inches.

What are the dimensions of the poster board?

In order to determine the dimensions, the area of the board has to be known. In order to determine the area, substitute for x in the given equation.

(14²) + (3 x 14) - 10

196 + 42 - 10

= 228

Factors of 228 = 12 and 19

To learn more about how to calculate the area of a rectangle, please check: https://brainly.com/question/16595449