Question

f(x) = - x2 + 2x + 1
urgente por favor

Answer 1

Δ= 2² - 4.(-1).1
     4+4= 8 

X= (-2 +- √8)/ -2
X= (-2+- 2,82)/ -2

X,= -2+2,82/ -2 = -2,41   X,= -2,41
X,,= -2-2,82/ -2 = -0,41   X,,= 0,41