a-1 + a-1 = 2b2 a-1+ b-1 a-1 - b-1 b2 - a2
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Answered by
1
Answer:
−
1
+
−
1
=
2
2
−
1
+
−
−
1
−
−
1
2
−
1
2
Step-by-step explanation:
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