The area of the large box is x^2 and the area of the small box is 3^2 which is 9. So the area of the leftover part is x^2-9 or (x-3)(x+3).
Hope that helped.
Y=3x
D. (-10, -30)
Replacing in the equation;
x=-10
y=3(-10)
y=-30
(8, 25)
Put 25 in for y and 8 for x. Answer checks out.
So you add 13+5=18
Then you do 144/18=8
8x13=104 8x5=40
104+40=144✅
Answer= 104 : 40
The answer should be y=-4x^2