find the other zero of quadratic polynomial 1 ^2 + 7 x - 60 if one zero is -12
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the other zero is -5/2
a=2,b=k,c=-15
alpha=3
alpha*beta=c/a
3*beta=-15/2
beta=-15/2*3
beta==5/2
therefore other zero is -5/2
a=2,b=k,c=-15
alpha=3
alpha*beta=c/a
3*beta=-15/2
beta=-15/2*3
beta==5/2
therefore other zero is -5/2
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