find the zeroes of polynomials 3x²-5x-28
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3x^2-12x+7x-28=0
3x(x-4x)+7(x-4)=0
(3x+7)(x-4)=0
x=-7/3,+4
3x(x-4x)+7(x-4)=0
(3x+7)(x-4)=0
x=-7/3,+4
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