Question

determine o valor numerico da seguinte expressao algebrica b²-4.a.c, para a=-1; b= -3 e c=10

Answer 1

X= b^2-4ac
X= (-3)^2-4.(-1).10
X= 9+4.10
X= 9+40
X=49

Answer 2

Delta = b² - 4.a.c
Delta = (-3)² - 4.(-1).10
Delta = 9 + 40
Delta = 49

X= -b+-√delta / 2.a
X= -(-3)²+-√49 / 2.(-1)
X= 9+-7 / -2

X1=9+7 = 16/-2 = -8
X2=9-7 = 2/-2 = -1