Question

решения (x+2y)в 3 степени

Answer 1

(х+2у)³=х³+3*х²*2у+3*х*4у²+8у³=х³+6х²у+12ху³+8у³

Answer 2

(х+2у) ³= (х+2у) (х+2у) (х+2у)=(х²+2ху+2ху+4у²) (х+2у)=х³+4х²у+4ху²+2х²у+8ху²+8у³=х³+6х²у+12ху²+8у³