Math, asked by sanjibmishra97451, 3 months ago

Plz help me plz............

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Answered by creatorssheen

1

put the value of x=1,y=-1

=1/7(9×1+12×1)(9×1-12)

=1/7(9+12)(9-12)

=1/7(21)(-3)

=3×(-3)

=-9

Answered by saikethan24

1

Step-by-step explanation:

please refer the above attachment..........

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