Answer to Question #129562 in Algebra for Tommy

Question

If x^2 -7x = 0, the value of x is

Answer 1

We can factor $x^2-7x=x(x-7)=0$, one of the factors $x$ and $x-7$ must be equal , hence $x=0$ or $x-7=0$, therefore, $x=0$ or $x=7.$

Answer: $x_{1}=0,\ x_2=7.$