Question

Resolva as equações
a) 2x²-6x-8=0
b) 2x²-4x+2=0
c) x²-2x+1=0
d)x²-x-2=0

Answer 1

A-
A=2 b=-6 c=-8
/\=(-6)²-4.2.(-8)
/\=36+64
/\=100
100=10
X=-(-6)+-10 ×1= +6+10=14=4
2.2 4 4
×2=+6-10=-4=-1
4 4