the sum of a natural no and its square is 210. find the no
Answers
Answered by
4
let number be x
square =x^2
x^2 +x =210
x^2+x-210=0
x^2 +15x-14x-210=0
x(x+15)-14(x+15)=0
(x+15)(x-14)=0
x-14=0 , x+15=0
x=14 , x= -15
x=14 is answer
square =x^2
x^2 +x =210
x^2+x-210=0
x^2 +15x-14x-210=0
x(x+15)-14(x+15)=0
(x+15)(x-14)=0
x-14=0 , x+15=0
x=14 , x= -15
x=14 is answer
Similar questions