Y = 2x ^ 2-10x-1の切片は何ですか?

Y = 2x ^ 2-10x-1の切片は何ですか?
Anonim

回答:

#y = -1#

#x_1 = 0,098#

#x_2 = 5,098#

説明:

#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#