Use FOIL to expand and simplify:
Triangle Tiger:
A = (2x + 6)(x - 4)
= 2x^2 -8x + 6x - 24
= 2x^2 - 2x - 24 ft^2 (N)
Anthony's Computer Monitor:
A = (x - 3)(2x + 1)
= 2x^2 + x - 6x - 3
= 2x^2 - 5x - 3 in^2 (I)
Art Class:
A = (x - 4)^2
= x^2 - 8x + 16 in^2 (O)
Easel:
A = [(2x - 5)(2x + 4)] / 2
= (4x^2 + 8x - 10x - 20) / 2
= (4x^2 - 2x - 20) / 2
= 2x^2 - x - 10 in^2 (E)
Four Square:
A = (x + 2)^2
= x^2 + 4x + 4 ft^2 (A)
