• Choice J

    (x+5)(x34)=0(x+5)(x-\frac{3}{4})=0

    =>(x+5)(x34)×4=0=> (x+5)(x-\frac{3}{4})\times4=0

    =>(x+5)(4x3)=0=> (x+5)(4x-3)=0

    =>4x23x+5×4x5×3=0=> 4x^2-3x+5\times4x-5\times3=0

    =>4x2+17x15=0=> 4x^2+17x-15=0

    =>4x2+17x15=y=> 4x^2+17x-15=y

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