In exercise 7.2 , 8th question , 2nd image , you wrote x1=2 , X2=2 , b

This question was asked in Ex 7.2, 8

In exercise 7.2 , 8th question , 2nd image , you wrote x1=2 , X2=2 , but in book and in diagram it is x1=(-2) and how it can be .