Rule in subtraction of polynomials: Chang the sign of each term of subtrahend, then proceed to addition rule.
(12yx + 14x - 8) - (8yx - 14x + 2)
(12yx + 14x - 8) + (-8yx + 14x - 2)
Combine the like terms:
12yx - 8yx + 14x + 14x - 8 - 2
= 4yx + 28x - 10 or 4xy + 28x - 10
ANSWER: 4xy + 28x - 10