BarkotR170406 BarkotR170406

28-10-2022
Mathematics

Answered

Simplify.(3.17 - 5i)?Write your answer in the form a + bi. Simplify all radicals.

Answer :

JosieU2357 JosieU2357

28-10-2022

[tex]\begin{gathered} (3\sqrt{7}-5i)^2=(3\sqrt{7}-5i)\cdot(3\sqrt{7}-5i) \\ =3\sqrt{7}\cdot(3\sqrt{7}-5i)-5i\cdot(3\sqrt{7}-5i) \\ =3\cdot3\cdot7-15i\sqrt{7}-15i\sqrt{7}-25 \\ =63-25-30i\sqrt{7} \\ =38-30i\sqrt{7} \end{gathered}[/tex]

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