“T\u00edch l\u00e0 kh\u00e1i ni\u1ec7m quan tr\u1ecdng trong to\u00e1n h\u1ecdc, \u0111\u1ea1i s\u1ed1 v\u00e0 c\u00e1c l\u0129nh v\u1ef1c kh\u00e1c. N\u00f3 bi\u1ec3u th\u1ecb s\u1ef1 t\u00edch l\u0169y, t\u1ed5ng h\u1ee3p ho\u1eb7c nh\u00e2n c\u00e1c y\u1ebfu t\u1ed1 l\u1ea1i v\u1edbi nhau. T\u00edch c\u00f3 \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh, t\u00ednh to\u00e1n di\u1ec7n t\u00edch v\u00e0 nhi\u1ec1u b\u00e0i to\u00e1n kh\u00e1c. Hi\u1ec3u r\u00f5 v\u1ec1 t\u00edch s\u1ebd gi\u00fap ch\u00fang ta hi\u1ec7u qu\u1ea3 h\u01a1n trong vi\u1ec7c \u00e1p d\u1ee5ng ki\u1ebfn th\u1ee9c to\u00e1n h\u1ecdc v\u00e0o cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y.”<\/p>\n