The length of the rectangle is x^2 + x - 3.
A rectangle is a four-sided shape. The opposite sides of a rectangle is equal. The sum of angles in a rectangle is equal to 360 degrees.
The perimeter of a rectangle is the distance round a rectangle. The perimeter of a rectangle = 2(length + width).
8x^2+10x-6 = 2(3x^2+4x + length)
Divide both sides of the equation by 2
4x^2 + 5x - 3 = 3x^2 + 4x + length
Length = (4x^2 + 5x - 3) - (3x^2 + 4x)
Length = x^2 - x - 3
To learn more about a rectangle, please check: https://brainly.com/question/16595449
