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Form polynomial equations of the lowest...

Form polynomial equations of the lowest degree , with roots as given below
`1pm sqrt(3) ,2,5`

Text Solution

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Required equation is
`[x-(1+sqrt(3))] [x-(1-sqrt(3)) ] [(x-2) (x-5)]=0..... (1)`
`[x-(1+sqrt(3))] [x-(1-sqrt(3)) ]`
`=[(x-1)-sqrt(3)] [(x-1)+sqrt(3) ]`
`=(x-1)^2-3=x^2-2x+1-3`
`=x^2-2x-2`
` (x-2)(x-5)=x^2-2x-5x+10`
`=x^2=7x +10`
Substituting in (1) , required equation is
`(x^2=2x-2)(x^2-7x+10)=0`
`rArr x^4-2x^3-2x^2-7x^3+14x^2+14x+10x^2-20x-20=0`
`rArr x^4-9x^3+22x^2-6x-20=0`
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VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-THEORY OF EQUATIONS -EXERCISE -4(a)
  1. Form polynomial equations of the lowest degree , with roots as given ...

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  2. Form polynomial equations of the lowest degree , with roots as given ...

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  3. Form polynomial equations of the lowest degree , with roots as given ...

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  4. Form polynomial equations of the lowest degree , with roots as given ...

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  5. If alpha,beta,gamma are the roots of 4x^3-6x^2+7x+3=0 then find th...

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  6. if 1,1,alpha are the roots of x^3-xx^2+9x-4=0 ,then find alpha .

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  7. If -1,2 and alpha are the roots of 2x^3 +x^2-7x-6=0 , then find alp...

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  8. If 1,-2 and 3 are roots of x^3-2x^2+ax+6=0 , then find a .

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  9. If the product of the roots of 4x^3+16x^2-9xa=0 is 9 , then find a .

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  10. Find the values of s1, s2,s3 and s4 for each of the following equation...

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  11. Find the values of s1, s2,s3 and s4 for each of the following equation...

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  12. If alpha, beta and 1 are the roots of x^3-2x^2-5x+6=0 , then find alp...

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  13. If alpha ,beta and gamma are the roots of x^3-2x^2+3x-4 =0 , then fi...

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  14. If alpha, beta and gamma are the roots of x^3 +px^2+qx+r=0 then find t...

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  15. If alpha, beta and gamma are the roots of x^3 +px^2+qx+r=0 then find t...

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  16. If alpha, beta and gamma are the roots of x^3 +px^2+qx+r=0 then find t...

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  17. If alpha, beta and gamma are the roots of x^3 +px^2+qx+r=0 then find t...

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  18. If alpha, beta and gamma are the roots of x^3 +px^2+qx+r=0 then find t...

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  19. If alpha, beta,gamma are the roots of x^3-6x^2+11x-6=0 then find t...

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  20. If alpha ,beta,gamma are the roots of x^3 -7x +6=0 then find the eq...

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