So, i need someone to show me the steps for solving the equation after equal sign. it is supposed to = 729, and i am pretty sure it does and it's true, but everytime i try to prove it i must be doing something wrong because i get insane answers instead.. can someone me and show the steps to getting 729 for this polynomial? ! (4+5)(4+5)(4+5) = 4^3+3(4)^2(5)+3(4)(5)^2+(5)^3