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y=0.0061x^2+0.3379X-11.551y分别等于3,18,37求x

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0.0061x²+0.3379x-11.551-3 = 061x²+3379x-145510 = 0x = -3379±√(3379²+4×61×145510) = -3379±6849.97= -10228.97,3470.970.0061x²+0.3379x-11.551-18= 061x²+3379x-295510 = 0x = -...