Question

Determina as raizes

x²=5x-2= -8

Answer 1

x²=5x-2=-8
x²=5x-2+8=0
x²-5x+2-8=0
x²-5x-6=0

delta=b²-4ac
delta=(-5)²-4.1.-6
delta=25+24
delta=49

x=-b+-_/delta /2a

x=5+-7/2

x˙=5+7/2
x˙=12/2
x˙=6

x"=5-7/2
x"=-2/2
x"=-1