What are the intercepts for #y=2x^2-10x-1#?

Question

1313 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-04-21T20:24:08

#y=-1#
#x_1=0,098#
#x_2=5,098#

enter image source here

#y=2x^2-10x-1#

#"for x="0" "rArry=-1 #

#"for y="0#

#2x^2-10x-1=0#

#Delta=sqrt(100+4*2*1)" "Delta=sqrt(108)" "Delta=10,39#

#x_1=(10-10,39)/4#

#x_1=(0,39)/4#

#x_1=0,098#

#x_2=(10+10,39)/4#

#x_2=(20,39)/4#

#x_2=5,098#