What is the answer to -3x-7yi=9-21i ?

The answer to -3x-7yi=9-21i is x=-3,y=3

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-3x-7yi=9-21i

- 3 x - 7 y i = 9 - 21 i

x = - 3, y = 3

Solution steps

- 3 x - 7 y i = 9 - 21 i

Complex numbers can be equal only if their real and imaginary parts are equalRewrite as system of equations:

[- 3 x = 9 - 7 y = - 21]

[- 3 x = 9 - 7 y = - 21] : x = - 3, y = 3

x = - 3, y = 3

z^{2} - (1 + i) z + 2 + 2 i = 0

(z - i + 1)^{2} = (2 z + i)^{2}

f, P = L + \frac{s i}{f}

2 (x + i y) = i (2 + 9 i)

5 x + 13 + (2 y - 7) i = - 2 + i