How do you solve #a^2=15a#?

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Answer 1 · 2017-07-30T13:08:03

#a = 0 or 15#

#a^2=15a#
#a^2-15a=0#
#a(a-15)=0#
By null factor theorem.
#a = 0# or #a-15=0#
Therefore #a = 0 or 15#

Answer 2 · 2017-07-30T14:35:36

#a=15#

#a^2 = 15a#

#a xx a = 15 xx a#

#a(a) = (15)a#

#cancela(a) = (15)cancela#

#a=15 -> Answer#