What do the properties of polynomial addition mean

Asoccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.1 in

Drag each tile into the correct box. not all tiles will be used. find the tables with unit rates greater than the unit rate in the graph. then tenge these tables in order from least to greatest unit rate

Which expression is equivalent to (4 +6i)^2? ? -20 + 48i 8 + 12i 16 - 36i 20 + 48i