If the roots x1x1 and x2x2 are the roots of the quadratic equation x2−2x+c=0x2−2x+c=0 also satisfy the equation 7x2–4x1=477x2–4x1=47, then which of the following is true? A c = –15 B x1=−5x1=−5 and x2=3x2=3 C x1=4.5x1=4.5 and x2=−2.5x2=−2.5 D None of these .

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