Question

resolva a equação :
f(x) = (x - 1)(x+2)​

Answer 1

f(x) = (x - 1)(x+2)

x^2+2x-1x-2

x^2+x-2=0

Delta= 1-4.1.-2=9

x= -1+-3/2

X'= 2/2= 1

X"= -4/2= -2