Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
Question: When a CPU can perform a multiplication in 12 nanoseconds (ns), an addition in 1 ns,
and a subtraction in 1.5 ns, which of the following is the minimum CPU time, in
nanoseconds, for the calculation of “a×a – b×b ” ?
Answer: 14.5
I believe it optimizes the equation to (a-b)*(a+b) so it’s subtraction + addition + multiplication = 12 + 1 + 1.5 = 14.5.
Though my math isn’t the best around so if I’m wrong just comment and don’t downvote so I can delete 😀