Book
Maths Puzzle
(x-1)(x-2)(x+1)=x^3
find x
Read Solution (Total 4)
-
- (x-1)(x-2)(x+1)=x^3
(x^2-1)(x-2)=x^3
x^3-2*x^2-x+2=x^3
2*x^2+x-2=0
solve by quadratic formula...answer will be (-1+sqrt(17))/4 and -1-sqrt(17)/4 - 11 years agoHelpfull: Yes(19) No(5)
- (x-1)(x-2)(x+1)=x^3
x^2-3x+2(x+1)=x^3
2*x^2+x-2=0
x=(-1+sqaure root of 17)/2
- 11 years agoHelpfull: Yes(1) No(0)
- (x-1)(x-2)(x+1)=x^3
(x^2-1)(x-2)=x^3
x^3-2*x^2-x+2=x^3
2*x^2+x-2=0
apply formula -b+/-(sqrt(b^2-4*a*c))/2*a a=2,b=1,c=-2
solve for x ans. is -5/4 and 3/4 - 11 years agoHelpfull: Yes(1) No(0)
- sry its (-1+square root of 17)/4
- 11 years agoHelpfull: Yes(0) No(0)
Book Other Question