#1177 · Algebra · Linear equations

Exponential Complex Expression Product

Multiply $e^{- 1} + e^{- - 1}$ by $e^{- 1} - e^{- - 1}$ .

~4 minAnswer checked instantlyexponential formdifference of squares

H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. VIII. Surds and Imaginary Quantities, Examples VIII.b, No. 3

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Checked against the answer in H. S. Hall & S. R. Knight, Higher Algebra (1891).