Question

he is the well known scientist and had a learning disability and did not speak until age 3. he is known in popular culture for his mass–energy equivalence formula.

Answer 1

That's Albert Einstein!

He didn't speak till the age of three and was a very quiet boy. That had put his parents in doubt about whether why does he not speak!
Also, he was the one who gave us the famous 'E = mc²' formula!

Answer 2

Answer:

That's Elbert Einstein!

He didn't speak till the age of three and was a very quiet boy. That had put his parents in doubt about whether why does he not speak! Also, he was the one who gave us the famous 'E = mc^2 ' formula !