(x-3):x2-6x+8/x+3 при x=-21

Question

(x-3):x2-6x+8/x+3 при x=-21

Answer 1

(-21-3)/441 +6*21-8/21 +3 = -8/147 + 126 -8/21 +3= -8/147 + 126*147/147- 8*7/147 +3*147/147= (-8+18522-56+441)/147= 18899/147= 128 целых 83/147