Sagot:
# x = -1-sqrt6 # o # x = -1 + sqrt6 #
Paliwanag:
# x ^ 2 + 2x-5 = 0 # ay maaaring nakasulat bilang
# x ^ 2 + 2x + 1-6 = 0 #
o # (x + 1) ^ 2- (sqrt6) ^ 2 = 0 #
o # (x + 1 + sqrt6) (x + 1-sqrt6) = 0 #
ibig sabihin # x + 1 + sqrt6 = 0 # i.e. # x = -1-sqrt6 #
o # x + 1-sqrt6 = 0 # i.e. # x = -1 + sqrt6 #
