NCERT Class XI Mathematics - Complex Numbers and Quadratic Equations - Solutions
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Question : 4
Total: 52
3 (7 + i7) + i(7 + i 7)
Solution:
3(7 + i7) + i(7 + i7) = 21 + 21i + 7i + 7 i 2
= 21 + (21 + 7)i + (–1)7 = 21 – 7 + 28i = 14 + 28i.
= 21 + (21 + 7)i + (–1)7 = 21 – 7 + 28i = 14 + 28i.
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