Find the numerical difference of the roots of the equation x^2-7x-17
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x²-(9-2)x-18=0
x²-(9-2)x-18=0x²-9x+2x-18=0
x²-(9-2)x-18=0x²-9x+2x-18=0x(x-9)+2(x-9)=0
x²-(9-2)x-18=0x²-9x+2x-18=0x(x-9)+2(x-9)=0(x-9)(x+2)=0
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