16x²+y²=65/36 (4x)²+(y)²=65/36 (4x+y)²-8xy==65/36 (4x+y)²==65/36+16/36 (4x+y)²=81/36 (4x+y)==9/6 64x³+y³+12xy(9/6)==729/216 64x³+y³=729/216 - 1 64x³+y³=(729-216)/216 64x³+y³=171/72==19/8 183 viewsJS, 07:40