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sunil sahu Grade: 12
        

sir


if x^3-31x+30=0


then how we will find values of x 

7 years ago

Answers : (1)

bibhash jha
15 Points
										

As we can see clearly , x=1 is a solution . therefore (x-1) is a factor


so dividing x^3-31x+30 by (x-1) we get x^2+x-30


so , x^3-31x+30=(x-1)(x^2+x-30)= (x-1)(x+6)(x-5)


therefore roots are x=1,-6 and 5

7 years ago
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