The required polygon whose area is to be calculated is attached below :
Answer:
16 unit²
Step-by-step explanation:
From the graph, the polygon is a triangle with height of 8 units and base of 4 units ;
Area of a triangle is given as :
Area = 1/2 * base * height
Area = 1/2 * 4 * 8
Area = 2 * 8
Area = 16 unit²
Try this explanation:
1. if to simplify the equation into the form ax²+bx+c=0 then to calculate 'D' ⇒ x²-8x-20=0; D=16+20=36. The value of D is greater 0, it means the given equation has two solutions.
2. Wrong step and correct way are shown in the picture in the attachment.
3. Description of the solution: the points with x=1;3 are the intersection points of the function y=x²-4x+3 and Ox-axis.
PS. all the details are in the attachment.
