Question 776141

(4-9i)^2  
Please show work thank you so much!


{{{(4 - 9i)(4 + 9i)}}}


{{{16 - 36i + 36i - 81i^2}}} ------ FOILing the binomials


{{{16 - 81(- 1)}}} ----- {{{i^2}}} = - 1


{{{16 + 81}}}, or {{{highlight_green(97)}}}