Question

Three times the square of a non-zero number is equal to fifteen times the number.what is the number?

Answer 1

5 because you subtract 15x and bring it to 3x^2 and get 3x^2-15x=0. Then take out the gcf and you get 3x(x-5)=0. Since it can't be 0, x-5=0 , the answer is 5.