Question

the difference of a number and its square is 870.what is the number

Answer 1

Let the no. be x. So according to the question.                        X^2-x=870. Solve the equation and you'll get the ans.

Answer 2

According to the question- x^2-x= 870 x^2-x-870=0 x^2-30x-29x-870=0 x(x-30)+29(x-30)=0 (x-30)(x+29) x-30=0 X=30