# Math Help - simple stuff but got stucked

1. ## simple stuff but got stucked

i. (1 + ex)(2 ex)

2. Hello, marikas!

It's a simple "FOIL" multiplication.
Exactly where is your difficulty?

$(1 + e^x)(2 - e^{-x})$
Multiply: . $(1)(2) - (1)(e^{-x}) + (e^x)(2) - (e^x)(e^{-x})$

And we have: . $2 - e^{-x} + 2e^x - 1 \;=\;\boxed{1 - e^{-x} + 2e^x}$

3. ## hi there

i just wanted to make sure it is correct! brilliant. thank you very much.ta!!