Daine simplified the expression. 8 times open paren 1 plus 2 i close paren minus open paren 7 minus 3 i close paren is equal to 1 plus 5 i What mistake did Daine make?
Answer
A
He did not apply the distributive property correctly for 8 times open paren 1 plus 2 i close paren .
B
He added the real number and coefficient of i in 8 times open paren 1 plus 2 i close paren .
C
He multiplied the two complex numbers when he should have subtracted.
D
He did not distribute the subtraction sign correctly for 7 minus 3 i .