Practice problem
Compute the value of 12+5i2+i\dfrac{12+5i}{2+i}2+i12+5i in the form a±bi.a\pm bi.a±bi.
5.8−2i5.8-2i5.8−2i
10+4i10+4i10+4i
5.8−0.4i5.8-0.4i5.8−0.4i
7.6+1.2i7.6+1.2i7.6+1.2i
Type a concept, like “slope” or “photosynthesis”.
