Final answer:
To evaluate dx²-y² when x = 9, y = 14, and z = 6, substitute the given values into the expression and simplify.
Step-by-step explanation:
To evaluate the expression dx²-y² when x = 9, y = 14, and z = 6, we substitute the given values into the expression. First, we substitute x = 9 and find the value of dx²-y² as:
dx²-y² = 9(9) ²-14² = 9(81)-196 = 729-196 = 533
Therefore, the value of dx²-y² when x = 9, y = 14, and z = 6 is 533.