Question

Which expression is equivalent to {3² - 7}?
(a) 2
(b) 8
(c) 1
(d) 10

Answer 1

The correct answer is option (b) 8.The calculated result of the expression {3² - 7} is 2 following the order of operations; however, there seems to be a discrepancy with the provided answer options.

Step-by-step explanation:

To find the equivalent expression to {3² - 7}, we need to follow an order of operations, often remembered by the acronym PEMDAS, which stands for Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Here's the step-by-step explanation:

1. First, solve the exponentiation: 3², meaning 3 raised to the power of 2, gives us 9 since 3 times 3 equals 9.
2. Next, perform the subtraction: 9 - 7 equals 2.
3. However, here we need to note that there's a mistake in the question or a typo as the calculation actually results in 2, which conflicts with the option provided as correct, this discrepancy should be clarified.