Question

Monday: Which is equivalent to (i+3)+i(2i−4)?
a. −5i+1
b. −i+3
c. i−3

−3i+1

Answer 1

remember : \(\rm\huge i^2=-1 \)

Answer 2

here we can apply the distributive property of multiplication over addition, so we can write this:
\[\Large \left( {i + 3} \right) + i\left( {2i - 4} \right) = i + 3 + \left( {i \cdot 2i} \right) - 4i = ...?\]

Answer 3

also, please keep in mind the reply of @rvc