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At+bx+c=012x²+5x+120find x​

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12 x 2+52 x −120=0 ... 12x2 + 52X - 120 = 4 • ( 3x2 + 13x - 30) ... 5.1 Find the Vertex of y = 3x2 +13x-30 ... For any PARABOLA,Ax2+Bx+C,the x - coordinate of the vertex is given by -B/(2A) .

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