Question

Give me the first step to solve (e^x - e^-x) / 2 = 2

Answer 1

the first step is to multiply both sides by e^x

Answer 2

then the next step make a proper substitution

Answer 3

\[[e^x-e^{-x}=4]e^x\]

Answer 4

\[e^{2x}-4e^x-1=0\]

Answer 5

let m=e^x

Answer 6

\[m^2-4m-1=0\]

Answer 7

then find the values of m, hence take the natural log to find the value of x

Answer 8

to get the value of m, use quadratic formula... it is cant be factored

Answer 9

yes this basic of how to solve a quadratic equation must be known by students, otherwise they must not be studying maths....