Novam24viz
Answered

x^2+x-1=0 x^2+4x-21=0

Sagot :

x=(-b+/-(√b²-4ac))over 2a
then
x=(-1+/-(√1²-4(1)(-1))over2(1)
x=(-1+/-(√1+4))over2
x=(-1+/-(√5))over2
the answer is x=(-1+√5)over2,x=(-1-√5)over2