Question

Explain how we find zero of polynomial x square minus X -1

Answer 1

these are the roots of equation

Answer 2

1x²-1x-1 = 0

this is from like ax²+ bx +c = 0 so

a = 1 b = -1 c = -1

using Shridhar's law
(+-) means plus or minus

x = -b+-√b²-4ac/ 2a

x = -(-1)+-√(-1)²-4(1)(-1)/2(1)

x = 1+-√1+4/2

x = 1+-√5/2

x = 1+√5/2. OR. x = 1-√5/2