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Without expanding prove that , |{:(a+bx,...

Without expanding prove that , `|{:(a+bx,c+dx,p+qx),(ax+b,cx+d,px+q),(u,v,w):}|=(1-x^2)|{:(a,c,p),(b,d,q),(u,v,w):}|`

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The correct Answer is:
[where` R_2^'=R_2-xR_1]`
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