Question

please solve:
(7 x 10^−8 m2) − (4 x 10−8 m2)

Answer 1

Important things to note here:
- Your units are the same for both expressions, so they can be 'factored out'.
- The orders of magnitude are also the same for both expressions, so they can also be factored out.

\(7 \times 10^{-8} m^2 - 4 \times 10^{-8}m^2\)
\(= (7 - 4) \times 10^{-8}m^2\)

Answer 2

3 x 10^-8 (mass squared)