Find all zeros of the function: f(x)=6x2−x−12\displaystyle {f{{\left({x}\right)}}}={6}{x}^{{2}}-{x}-{12} .

The zeros are x=\displaystyle {x}=   

Find all zeros of the function:  g(x)=x2−13x+42\displaystyle {g{{\left({x}\right)}}}={x}^{{2}}-{13}{x}+{42} .

The zeros are x=\displaystyle {x}=    

Find all zeros of the function:  n(x)=4x2+5x−6\displaystyle {n}{\left({x}\right)}={4}{x}^{{2}}+{5}{x}-{6} .

The zeros are x=\displaystyle {x}=    

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