Problem

Problem

Solve the following in a systematic manner. a. (i) Factor the quadratic polynomial 3x2−15x−183x^{2}-15x-18 completely. b. (ii) Using the factors obtained, solve 3x2−15x−18=03x^{2}-15x-18=0. c. (iii) Verify each root by direct substitution in the original equation.

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