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Find which of the following equations ar...

Find which of the following equations are quadratic :
(i) `(3x-1)^(2)=5(x+8)`
(ii) `5x^(2)-8x=-3(7-2x)`
(iii) `(x-4)(3x+1)=(3x-1)(x+2)`
(iv) `x^(2)+5x-5=(x-3)^(2)`
(v) `7x^(3)-2x^(2)+10=(2x-5)^(2)`
(vi) `(x-1)^(2)+(x+2)^(2)+3(x+1)=0`

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