Question

a reta F(x)= -x corta a parábola F(X)= -2x-2x+3

Answer 1

-x = -2x² -2x +3

2x² +x -3 = 0

∆= 1 +24= 25 => √∆=5

x'= -b+√∆/2a = -1+5/4= 4/4=1

x"= -b-√∆/2a = -1-5/4= -6/4=-3/2

=> p'(1, -1)

=> p"(-3/2, 3/2)