How do you multiply #(8i ) ( - 4i ) \cdot - 7#?
1 Answer
Sep 21, 2017
Explanation:
#•color(white)(x)i^2=(sqrt(-1))^2=-1#
#rArr(8i)(-4i)-7#
#=-32i^2-7=32-7=25#
#•color(white)(x)i^2=(sqrt(-1))^2=-1#
#rArr(8i)(-4i)-7#
#=-32i^2-7=32-7=25#