Lauren simplified the expression (mm)
as shown.
-7+(-5) = m 12
= m
m!
Which statement explains Lauren's error?
OOOO
O She should have subtracted the exponents instead of adding them.
She should have multiplied the exponents instead of adding them.
She should have found -2, not-12, as the exponent when she added.
O She should have written m-12 as-m12