Simplify: 2(a - 1)(7a - 3) - 3(6a - 2)(2a

question 91

Essay

Simplify: 2(a - 1)(7a - 3) - 3(6a - 2)(2a + 1)

---

Definitions:

Primary Circuit

The main electrical circuit in a system that carries the primary power used for the system's operation.

Treadle Valve

A foot-operated valve that controls the flow of air in a pneumatic system, often used in braking systems of heavy vehicles.

Inversion Valve

A normally open air brake valve used for emergency applications of tractor brakes for a one-time stop during a total system failure. Hold-off air is dumped in relation to application pressure so that spring chamber force can effect emergency service braking. Incorporated in some modulating valves.

Tractor Protection Valve

A safety valve in commercial vehicles that prevents air loss in the tractor in the event of a trailer breakaway or air line failure.