Question

equaçao do segundo grau =x² +3x -6=-8

Answer 1

x²+3x-6+8
x²+3x+2

a:1
b:3
c:2

∆:b²-4a.c
∆:3²-4.1.2
∆:9-8
∆:1

x':-b+√∆÷2a
x':-3+1÷2.1
x':-2÷2
x':-1

x":-b-√∆÷2a
x":-3-√1÷2.1
x":-3-1÷2
x":-4÷2
x":-2