Question

What is the value of the product (3 – 2i)(3 2i)? 5 9 4i 9 – 4i 13

Answer 1

Answer: (3 – 2i)(3 2i)=13

Explanation:

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Answer 2

`\left( 3-2i\right) \left( 3+2i\right) =13`

Explanation:

Note :

i² = −1

(a - b)(a + b) = a² - b²

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`\left( 3-2i\right) \left( 3+2i\right) =3^(2) - (2i)^2`

`=9 - (2)^2* i^2`

`=9 - 4(i)^2`

`=9-4*(-1)`

`=9+4`

`=13`