How do you evaluate \sqrt { 25} - 9\cdot 2^ { 3}?

1 Answer
Jan 2, 2017

The answer is -67.

Explanation:

Order of operations precedence rules say to evaluate the power 2^3 before multiplying it by 9, so 9*2^(3)=9*8=72.

Since sqrt(25)=5 (take just the positive square root when you see this symbol in this context), it follows that sqrt(25)-9*2^(3)=5-72=-67.