Question

Fatore a equação 2x² + x - 1

Answer 1

a=2
b=1
c=-1
x= b² - 4ac
x=1² - 4.2.(-1)
x= 1 + 8
x=9
Δ= -b +- √Δ/2a
Δ= -1 +- √9/2.1
Δ= -1 +- 3 /2
x'= -1 + 3/2= 2/2=1
x''= -1-3/2=-4/2=2