f(x)=√2-2x When x=-4,4

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If f(x)=√(2-2x), f(-4)=√(2-(-8))=√10; f(4)=√(2-8)=√-6=i√6 where i is the imaginary square root of -1.

If f(x)=(√2)-2x, f(-4)=8+√2; f(4)=-8+√2.

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