Substitution into a function

Substitution into a function

TGM Original

Let \(f(x)=2x^2-3\). Find \(f(-2)\), simplify \(f(a+1)\), and solve \(f(x)=15\).

Solution:

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Answer:\(5\); \(2a^2+4a-1\); \(x=\pm3\).

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