Question

a)x²+2=0

b)x²+2x-1=0

Me ajudem sò por favor.

Answer 1

a)x²+2=0
x²=-2
x=√-2
x=±√-2
x1=-√2 ^ x2=√2

b)x²+2x-1=0
a=1
b=2
c=1
∆=b²-4•a•c
∆=2²-4•1•1=0
X1,2=-b±√0/2•a
=-2±0/2•1
x =--1 x2=1