Of A(-2,-1),B(a ,0),C(4, b)a n dD(1,2) a...

Of `A(-2,-1),B(a ,0),C(4, b)a n dD(1,2)` are the vertices f a parallelogram, find the values of `aa n dbdot`

3, 1

`-3, 1`

1, 3

`-1, -3`

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