Question

Am de rezolvat o ecuatie exponentiala si ma incurc aici: x^2-x=5x-5

Answer 1

x²-x=5x-5
x²-6x+5=0
x²-5x-x+5=0
x(x-5)-(x-5)=0
(x-5)(x-1)=0⇒x-5=0=>x=5
                   ⇒ x-1=0=>x=1
S:x∈{1,5}