Question

resolva essa equação - x2 + X + 12 =0

Answer 1

- x^2 + x + 12 = 0
a=-1..b=1..c=12
formula DELTA
delta = b^2 - 4 a c
delta = (1)^2 - 4(-1)(12)
delta = 1 + 4 (12)
delta = 1 + 48
delta = 49
firmula de BRASKARA
X = - b +,- \/delta /2a
X = - (1) +,- \/49/2(-1)
X = - 1 +,- 7/ - 2
X1 = -1 + 7/- 2》X1 = 1+7/2》X1 = 8/2》X1=4
X2 = -1-7/-2》X2 =1-7/2》X2 = - 6/2》
X2= -3