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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

(3x – 2i y) (2 + i)2 = 10 (1 + i)

Given:


⇒ (3x-2iy)(2+i)2=10(1+i)


⇒ (3x-2yi)(22+i2+2(2)(i))=10+10i


We know that i2=-1


⇒ (3x-2yi)(4+(-1)+4i)=10+10i


⇒ (3x-2yi)(3+4i)=10+10i


Dividing with 3+4i on both sides


⇒


Multiplying and dividing with 3-4i


⇒


⇒


⇒


⇒


⇒


Equating Real and Imaginary parts on both sides we get


⇒


⇒


∴ The values of x and y are .


More from this chapter

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1

Express the following complex numbers in the standard form a + i b :

2

Find the real values of x and y, if

(x + i y) (2 – 3i) = 4 + i

2

Find the real values of x and y, if

2

Find the real values of x and y, if

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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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