50. From a2+2ab+b2 take a2-2ab+b2. 51. From a2+2ab+b2 take a2 - b2. 54. From a2-3ab+11abx-17 take a2—6abx+71. 61. 60. 11ac + 7abx-6 -9ac-11abx +19c 62. 11ax+7by+12aby-11ay 3acx+7x+79abx -12ax-8by-12aby+11ay 8acx+8ax+84abx 75. From 872-37cy +8ab subtract 67x+67cy +18ab. 76. From 672 +69cy+18ab subtract 87x-37cy +8ab. 77. From 64ax-37cy+a2b2 subtract 7ax+a22 -84cy. 78. From a2-2ab+b2 subtract 6a2-7ab-862, and from the answer take 6a2-7ab+362. 79. From 3a2-6ax+7y take 64a2+7ax-8y, and from the answer take 11a2+3ax-7y. 80. From 3ax-7by+3a2b2+7axy take 34ax-8axy +-4a2b2+7by, and from the answer take 11by-6a2b3 +7axy-12ax+7. 81. (a2—b2+c2—3c2) — (8a2+6c2 —202+8b3), 16. 17. 18. 19. 20. 21. 22. 23. 24. 17a2x-6xy-3xy2+9by-abx+88. 20x2y-4bxy+12ax-95cx+81c+5cy. 4x2-2cx2+5y. 8cx-161ab+7. -11c-8x+15cx-9ax. 61ax-24bx-cx-11. |