Question

x ao quadrado + x - 12 = 0
com delta e fórmula do x, por favooor

Answer 1

∆ = b²- 4.a.c
∆ = 1² - 4.1.(-12)
∆ = 1 + 48
∆ = 49

-b±√∆/2.a

-1 ± √49/2
x' = -1 + 7/2 x' = 3
x" = -1 - 7/2 x" = -4.

Answer 2

X²+X-12=0

a=1

b=1

c=-12

-b±(∆=√b²-4.a.c)/2.a

-1±(∆=√1²-4×1×(-12))/2×1

-1±(∆=7)/2

-1±7/2

X'=-1+7/2=4

X"=-1-7/2=-3