Question

Starting from (-1)x5, write various products showing some pattern to show (-1)x(-1)=1
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Answer 1

Answer:

According to the pattern,

(−1)×(5)=−5

(−1)×(4)=−4

(−1)×(3)=−3

(−1)×(2)=−2

(−1)×(1)=−1

(−1)×(0)=0

(−1)×(−1)=1