Answer :
use distributive property and multiply first
(85-65i+68i-52i^2)-(85-65i+51i-39i^2)
(85+3i-52i^2)-(85-14i-39i^2) the subtraction sign applies to each part so
85+3i-52i^2-85+14i+39i^2 then add like terms
17i-13i^2
i^2 means i squared.
(85-65i+68i-52i^2)-(85-65i+51i-39i^2)
(85+3i-52i^2)-(85-14i-39i^2) the subtraction sign applies to each part so
85+3i-52i^2-85+14i+39i^2 then add like terms
17i-13i^2
i^2 means i squared.
