a certain number added to its square is 30 find the number
Answers
Answered by
1
let the number=x
x+x^2=30
bring 30 to the left-hand side:
x+x^2-30=0
use quadratic equations to solve:
x^2+x-30
x^2+6x-5x-30=0
x(x+6)-5(x+6)=0
(x+6)*(x-5)=0
x= -6 or 5 but normally the positive value is taken so the number is 5
HOPE THIS HELPS!!!
x+x^2=30
bring 30 to the left-hand side:
x+x^2-30=0
use quadratic equations to solve:
x^2+x-30
x^2+6x-5x-30=0
x(x+6)-5(x+6)=0
(x+6)*(x-5)=0
x= -6 or 5 but normally the positive value is taken so the number is 5
HOPE THIS HELPS!!!
Similar questions