Question

What is the positive solution to the equation 0 = –x2 + 2x + 1?

Answer 1

Answer:

x=1+√2

Step-by-step explanation:

0=-x2+2x+1

or x2-2x-1=0

x=1/2*[2±√(2²-4*1*(-1))]

=1/2*[2±√(4+4)]

=1/2*[2±2√2]

=1±√2

so positive value of

x=1+√2