Question 154084
Starting with:
(4x-3)(2x-7)
.
You would expand it by "FOIL" --
F -- first
O -- outer
I -- inner
L -- last
.
F: 4x*2x = 8x^2 (where ^ signifies exponentiation)
O: 4x*(-7) = -28x
I: (-3)(2x) = -6x
L: (-3)(-7) = 21
.
Combine terms:
8x^2 + (-28x) + (-6x) + 21
8x^2 + (-34x) + 21
8x^2 - 34x + 21  square feet