A negative sign in front of a quantity can be interpreted to mean ‘‘opposite.’’ For instance –3 can be called ‘‘the opposite of 3’’. Viewed in this way, we can see that –(–4) means ‘‘the opposite of –4’’. But the opposite of –4 is 4: –(–4) = 4.
Examples
–(–25) =
25
–(–x)
= x
–(–3y)
= 3y
Sumber
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Mathematician
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