Can someone plz explain compound areas

A compound shape is a shape that is made up from other simple shapes. In this article we will be working out the area of a L shape (made up from 2 rectangles). To find the area of a compound shape, follow these simple steps: Step 1: Work out the missing lengths around the edge of the compound shape.

Step-by-step explanation:

The system of equations is not completely solved.

y=x^2+3x-5 
y=4x+1 
x^2+3x-5=4x+1 
x^2-x-6=0 
(x-3) (x+2)=0 
x₁=3 and x₂=-2 

now we solve for y:
y=4x+1 
y₁ = 4*3+1 = 13
y₂ = 4(-2) + 1 = -7

The graphs intersect at. (-2, -7) and (3, 13)