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WBJEE2020MathematicsComplex NumberActual

The equation z z +(2-3 i) z+(2+3 i) z +4=0 represents a circle of radius

Options

A6 unit

Correct answer

1

Step-by-step solution

Hint: Centre and radius of z z + a z+a z +b=0 are -a and |a|²-b radius = 13-4 =3

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