Question

2x²+x-1=0 Descriminante__. ________ x²3x-4=0 Descriminante____ ________ x²+x8+16=0 Descriminante___. ______

ayuda porfavor​

Answer 1

2x^2 + x - 1= 0
a=2; b=1; c= - 1

∆= b^2 - 4ac

∆= (1)^2 - 4(2)(-1)

∆= 1 + 8

∆= 9

x^2 + 3x - 4= 0
a=1; b=3; c= - 4

∆=b^2 - 4ac

∆= (3)^2 - 4(1)(-4)

∆= 9 + 16

∆= 25

x^2 + 8x + 16= 0
a=1; b=8; c=16

∆= b^2 - 4ac

∆= (8)^2 - 4(1)(16)

∆= 64 - 64

∆= 0