Answer: See below
Step-by-step explanation:
1) For the first question, we have to multiply the width by the length to find the area of the whole rectangle:
(4x-4)(x+1)= 4x^2 -4
2) For the second question, we have to multiply the width by the length to find the area of the shaded area in the rectangle:
(2x+2)(x-1)= 2x^2-2
3) The total area of the unshaded part of the whole triangle equals the area of the whole rectangle minus the shaded area:
4x^2-4 - 2x^2 -2 = 2x^2 - 6
