Question

Evaluate the expression 3.14(a2 (a squared) + ab) when a = 4 and b = 2. (Input decimals only, such as 12.71, as the answer.)

Answer 1

First, start out by inserting the numbers:

3.14(4(2) (4^2) + 4(2)

Next, multiply the given numbers:

3.14(8 (4^2) + 8)

Then, multiply 4^2 (since the exponent is 2, multiply 4 two times: 4 * 4):

3.14(8 (16) + 8)

Now, multiply the first 8 to 16:

3.14(128 + 8)

Use the distributive property to solve this next one:

401.92 + 25.12

Finally, add up you two decimals:

427.04
You should get 427.04 (I could be wrong though).
Hopefully that helped! :)