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Mathematics for IGCSE & O level - Indices 2 (Section 1 - No. 48)

What is the value of x when x-2 = 4?
0.5
-0.5
2
-2

Тайлбар

x-2=1/x2 = 4, therefore x2=1/4 and x=-0.5 or +0.5

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