This is How I Mentally Estimate Square Roots. This methods uses the concept of Linear Approximation which is also discussed at the end of the video. #estimation | Math Avenue : Learn Math By Examples

14K views · 682 reactions | Among the topics our students study in their first term is Linear Algebra. You can watch their first lecture now. Andy Wathen's our guy at the whiteboard. Lectures are followed by tutorials where pairs of students and a tutor go through the work. Full lecture: https://www.youtube.com/watch?v=MieZJ0bxv7k | Oxford Mathematics | Facebook