Question

I need help for number 19, please

Answer 1

`\large\boxed{x=-3i}`

Explanation:

`(x-i)^5=32(x+i)^5\\\\(x-i)^5=2^5(x+i)^5\qquad\text{use}\ (ab)^n=a^nb^n\\\\(x-i)^5=\bigg(2(x+i)\bigg)^5\iff x-i=2(x+i)\qquad\text{use distributive property}\\\\x-i=2x+2i\qquad\text{add}\ i\ \text{to both sides}\\\\x=2x+3i\qquad\text{subtract 2x from both sides}\\\\-x=3i\qquad\text{chnage the signs}\\\\x=-3i`