If 1∆ - 5 = 5, 4∆7 = -28 and -1∆ - 3 = -3, then find the value o – McqOptions

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1.	If 1∆ - 5 = 5, 4∆7 = -28 and -1∆ - 3 = -3, then find the value of 8∆ - 8 = ?
A.	64
B.	-48
C.	45
D.	74
Answer» B. -48

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