Mathematics teacher of Daqing No.1 Middle School

Known; As shown in the figure, take a little e outside the square ABCD? , connect AE, BE, DE. The intersection point A makes the vertical line of AE intersect at point P, if AE=AP- 1, PB= root number seven. What is the area of square ABCD?

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Please recommend me some good exercise books and teaching materials (the second volume of Grade 8). Mathematics Education Edition English Kindness Edition Physics Beijing Normal University Edition.

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