(Pre-Calculus) How do I simplify this expression? I know I'm supposed to multiply the numerator and denominator by the conjugate but I'm not sure what to do about all of the radicals in this expression.

PreCalculus How do I simplify this expression I know Im supposed to multiply the numerator and denominator by the conjugate but Im not sure what to do about all class=

Respuesta :

Answer:

1+√6+i(√3+√2)

3

Step-by-step explanation:

i will start from multiplying the numerator and denominator by the conjugate

(1+√3 i)(1+√2 i)

(1-√2 i)(1+√2 i)-----> 1²-(√2 i)²

open brackets

1+√3i+√2i+√6i²

1-2i²

i²= -1

1+i(√3+√2)+√6(-1)

1-2(-1)

1+√6+i(√3+√2)

3

quick clarification

[tex]\cfrac{1+\sqrt{3}i}{1-\sqrt{2}i}\cdot \cfrac{1+\sqrt{2}i}{1+\sqrt{2}i}\implies \cfrac{(1+\sqrt{3}i)(1+\sqrt{2}i)}{\underset{\textit{difference of squares}}{1^2-(\sqrt{2}i)^2}}\implies \cfrac{1+\sqrt{2}i+\sqrt{3}i+\sqrt{6}i^2}{1-[2i^2]} \\\\\\ \cfrac{1+\sqrt{2}i+\sqrt{3}i+\sqrt{6}(-1)}{1-[2(-1)]}\implies \cfrac{1-\sqrt{6}+i(\sqrt{2}+\sqrt{3})}{3}[/tex]