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13. Complex Numbers
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Q2 of 153 Page 13

Find the real values of x and y, if

(x + i y) (2 – 3i) = 4 + i

Given:


⇒ (x+iy)(2-3i)=4+i


⇒ x(2-3i)+iy(2-3i)=4+i


⇒ 2x-3xi+2yi-3yi2=4+i


We know that i2=-1


⇒ 2x+(-3x+2y)i-3y(-1)=4+i


⇒ (2x+3y)+(-3x+2y)=4+i


Equating Real and Imaginary parts on both sides, we get


⇒ 2x+3y=4 and -3x+2y=1


On solving we get,


⇒


∴ The real values of x and y are .


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1

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Questions · 153
13. Complex Numbers
1 2 3 3 3 3 3 3 3 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 3 3 3 3 3 3 4 4 4 4 5 6 7 8 9 10 11 12 13 14 15 16 16 16 16 16 17 18 19 20 21 22 23 24 25 26 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 3 3 3 3 4 5 6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
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