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  • 13-06-2019
  • Mathematics
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What is the value of the product (3-2i) (3+2i)

Respuesta :

gmany
gmany gmany
  • 15-06-2019

Answer:

[tex]\large\boxed{(3-2i)(3+2i)=13}[/tex]

Step-by-step explanation:

[tex](3-2i)(3+2i)\qquad\text{use}\ (a-b)(a+b)=a^2-b^2\\\\=3^2-(2i)^2=9-4i^2\qquad i=\sqrt{-1}\to i^2=-1\\\\=9-4(-1)=9+4=13[/tex]

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