Remember that i^2 = -1
25-4i^2 = 25+4 = 29
10 + 21i - 10i^2 = 10 + 21i + 10 = 20 + 21i
So, you have (20 + 21i)/29 = 20/29 + 21/29 i
Dividing: Write the expression as a complex number in standard form
1) 2+5i/5+2i
2) 6-i√2/6+i√2
for the first one I solved it and I only got this far: 10+21i-10i^2/25-4i^2
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