Question

(5j² - 3j + 4) - (8j² + 2)

Answer 1

$(5j^2-3j+4)-(8j^2+2)$

where a j is powered 2, the result is -1 , then replace and simplify the brackets

$\begin{gathered} (5(-1)-3j+4)-(8(-1)+2) \\ (-5-3j+4)-(-8+2) \\ -5-3j+4+8-2 \end{gathered}$

now, group the numbers without j

$(-5+4+8-2)-3j$

and operate

$5-3j$

solution is 5-3j