Вправи: 109

109. Спростіть вираз:

1) b + 7 – 14bb+7 = b+ 7\b+71 – 14bb+7 = (b+7)2- 14bb+7 = b2+ 14b+49-14bb+7 = b2+ 49b+7;

2) 5c – 10-29c+10c22c-5 + 2 = 5c+ 2\2c-51 – 10-29c+10c22c-5 = 2c-55c+2- (10-29c+10c2)2c-5 = 10c2+ 4c-25c-10-10+29c-10c22c-5 = 8c-202c-5 = 4(2c-5)2c-5 = 4.