Question

encontre as raizes ou zeros das seguintes funcoes usando a formula bhaskara f(x)=x2+x-20

Answer 1

X2 + x - 20 Delta = 1 - 4.1.-20 Delta = 81 = 9 X = -1 + 9 X' = 8 X'' = - 10

Answer 2

x²+x+20
Delta
b² -4.a.c
1²+4.1.20=
81 »» raiz de 81=9

x= (-1)² + ou - 9
_____________
2
x'= 5 x''= 4