ME Test

Question

In a particular number system x^3 +bx^2 +cx -190=0 has roots x=5,8 and 9. The base of the number system is _______

Comments

15

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wait

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@Shadan Karim

@pawan kumarln

Answer 1

product of roots= - Constant term/ Coefficient of x^3

(5)b *(8)b *(9)b=-(-190)/1

b^2+9b=360

b^2+24b-15b-360=0

b(b+24)-15(b+24)=0

(b-15)(b+24)=0

b=15 or -24 so Answer is 15