Question

What is the simplified form of the following expression
3[42-2-(10^2-9^2)]

Answer 1

Using the order of operations (PEMDAS/BODMAS), we simplify the expression as follows:

First, we simplify the exponent:
9^2 = 81

Next, we simplify the contents of the parentheses:
10^2 - 9^2 = 100 - 81 = 19

Then, we simplify the rest of the expression outside of the parentheses:
42 - 2 = 40

Finally, we multiply 3 by the remaining value:
3 * (40 - 19) = 3 * 21 = 63

So, the simplified form of the expression 3[42-2-(10^2-9^2)] is 63.