Question

f : R-›R, f(x) = x² + 2x - 1​

Answer 1

Răspuns:

f : R-›R

f(x) = x² + 2x - 1

x²+2x-1=0

delta,=b²-4ac,=4+4=8=2³

x1=(-2+2√2)/2=2(√2-1)/2=√2-1

x2=(-2-2√2)/2=-2(√2+1)/2=-√2-1

f(x)=(x-x1)(x-x2)

f(x)=(x-√2+1)(x+√2+1)