Q4 of 153 Page 14

Mark the Correct alternative in the following:

If then possible value of is



Square both sides


a + ib = (x + iy)2 = x2 + i2xy -y2


So, we can say that a = x2 – y2 and b = 2xy


a – ib = (x2 – y2) – i(2xy)


= (x)2 + 2(x)(-iy) + (-iy)2


= (x + (-iy))2


= (x – iy)2


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