What is expand (e^{7x}-e^{-7x})^2 ?

The solution to expand (e^{7x}-e^{-7x})^2 is e^{14x}-2+e^{-14x}

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expand (e^{7x}-e^{-7x})^2

expand

(e^{7 x} - e^{- 7 x})^{2}

e^{14 x} - 2 + e^{- 14 x}

Solution steps

(e^{7 x} - e^{- 7 x})^{2}

Apply Perfect Square Formula:

(a - b)^{2} = a^{2} - 2 ab + b^{2}

a = e^{7 x}, b = e^{- 7 x}

= (e^{7 x})^{2} - 2 e^{7 x} e^{- 7 x} + (e^{- 7 x})^{2}

Simplify

(e^{7 x})^{2} - 2 e^{7 x} e^{- 7 x} + (e^{- 7 x})^{2} : e^{14 x} - 2 + e^{- 14 x}

= e^{14 x} - 2 + e^{- 14 x}

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What is expand (e^{7x}-e^{-7x})^2 ?
The solution to expand (e^{7x}-e^{-7x})^2 is e^{14x}-2+e^{-14x}