Which of thr following is a Q.E....

Which of thr following is a Q.E.

A

`(x + 1)^(2) = 3(x + 7)`

B

`(x - 1) (x + 3) = (x -2) ( x + 1)`

C

`x^(2) + 5x - 7 = (x - 4)^(2)`

D

`x^(3) - 9 = 0`

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The correct Answer is:

A

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