Question: -2a3
for a = 3
Step 1: Substitute 3 for a, because a = 3
-2(3)3
Step 2: Use order of
operations. The order of operations calls for exponents before multiplying, so
3 to the third power is 27 (3 x 3 x 3 = 27)
The order of operations is:
Parenthesis
Exponents
Multiply
Divide
Add
Subtract
-2(27)
Step 3: Multiply –2 by 27. The answer is –54.
Answer: -54