Question

2x² - 18x = 0
Resolva a equação

Answer 1

a=2 b=-18 =0

∆=b²-4.a.c

∆=(-18)²-4.2.0

∆=324-0

∆=324

X= -b ±√∆

2.a

X=--(18)±√324

4

X=18±18

4

x1=18+18

4

x1=36/4=9

x2=18-18

4

x2=0

Answer 2

2x² - 18x = 0

delta= b²-4ac

delta= (-18)²-4.2.(-18)

delta=324+144

delta=468

x= -b+-vdelta/2a

x= 18+-v468 /2.2

x=18+-2v117/4

x1=18+2v117/4

x1= 20v117/4

x1= 5v117

x2=18-2v117/4

x2=-16v117/4

x2=-4v117