hancoffey hancoffey 18-05-2017 Mathematics contestada Simplify (8j3 – 10j2 – 7) – (6j3 – 10j2 – j + 12). 2j3 – 20j2 – j + 5 2j3 + j – 19 2j3 – 20j2 + j – 19 2j3 – j + 5