Sagot:
# x ^ 2 + 2x-8 = 0 #
#x = (- 2 + -sqrt (2 ^ 2-4 * 1 * (- 8))) / (2 * 1) = (- 2 + -sqrt (36)) / (2) = (- 2+ -6) / (2) #
#x = (- 2-6) / (2) = (- 8) / (2) = - 4 #
#x = (- 2 + 6) / (2) = (4) / (2) = 2 #
# y = (x + 4) (x-2) #
Paliwanag:
Kung gusto mong makilala # x ^ 2 + 2x-8 #.
Pagpili ng parisukat na equation na makapagpapatunay.
# x ^ 2 + 2x-8 = 0 #
#x = (- b + -sqrt (b ^ 2-4ac)) / (2a) #
Saan # a = 1, b = 2 # at # c = -8 #
#x = (- 2 + -sqrt (2 ^ 2-4 * 1 * (- 8))) / (2 * 1) = (- 2 + -sqrt (36)) / (2) = (- 2+ -6) / (2) #
Aling ay magbibigay, #x = (- 2-6) / (2) = (- 8) / (2) = - 4 #
At, #x = (- 2 + 6) / (2) = (4) / (2) = 2 #
Ang iyong form na formized ay magiging, # (x + 4) (x-2) #