1 ) ( 8 * х + 3 * у ) ^ 2 = ( 8 * x ) ^ 2 + 2 * 8 * x * 3 * y + ( 3 * y ) ^ 2 = 64 * x ^ 2 + 48 * x * y + 9 * y ^ 2; 2 ) ( 6 * m - 4 * n ) ^ 4 = ( 6 * m - 4 * n ) ^ 2 * ( 6 * m - 4 * n ) ^ 2 = ( ( 6 * m ) ^ 2 - 2 * 6 * m * 4 * n + ( 4 * n ) ^ 2 ) * ( ( 6 * m ) ^ 2 - 2 * 6 * m * 4 * n + ( 4 * n ) ^ 2 ) = ( 36 * m ^ 2 - 48 * m * n + 16 * n ^ 2 ) * ( 36 * m ^ 2 - 48 * m * n + 16 * n ^ 2 ) = 1296 * m ^ 4 - 1728 * m ^ 3 * n + 576 * m ^ 2 * n ^ 2 - 1728 * m ^ 3 * n - 2304 * m ^ 2 * n ^ 2 - 768 * m * n ^ 3 + 576 * n ^ 2 * m ^ 2 - 768 * n ^ 3 * m + 256 * n ^ 4 = 1296 * m ^ 4 - 3456 * m ^ 3 * n + 576 * m ^ 2 * n ^ 2 -1728 * m ^ 2 * n ^ 2 - 1536 * n ^ 3 * m + 256 * n ^ 4 ;3 ) ( а ^ 2 + 3 * х ) ^ 2 = ( a ^ 2 ) ^ 2 + 2 * a ^ 2 * 3 * x + ( 3 * x ) ^ 2 = a ^ 4 + 6 * x * a ^ 2 + 9 * x ^ 2.