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Find the number of quadratic equations, ...

Find the number of quadratic equations, which are unchanged by squaring their roots.

A

2

B

4

C

6

D

none of these

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The correct Answer is:
B
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OBJECTIVE RD SHARMA ENGLISH-QUADRATIC EXPRESSIONS AND EQUATIONS -Exercise
  1. If bot the roots of lamda(6x^(2)+3)rx+2x^(2)-1=0 and 6 lamda(2x^(2)+1)...

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  2. If x=2+2^(2//3)+2^(1//3) , then the value of x^3-6x^2+6x is

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  3. Find the number of quadratic equations, which are unchanged by squarin...

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  4. If the product of the of the equation x^(2) - 3kx + 2e^(2log(e^(k))) =...

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  5. If one root of x^(2) + px+12 = 0 is 4, while the equation x ^(2)...

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  6. if the difference of the roots of the equation x^(2)-px +q=0 is unity...

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  7. If alpha, beta are roots of the equation ax^2 + bx + c = 0 then the...

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  8. The number of roots of the equation, x-2/(x-1)=1-2/(x-1) is 0 (b) 1 ...

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  9. The number of real roots of the equation x^(2)-3|x|+2=0 is

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  10. If the equation a/(x-a)+b/(x-b)=1has two roots equal in magnitude and ...

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  11. If one of the roots of the equation ax^2 + bx + c = 0 be reciprocal ...

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  12. If sin alpha and cos alpha are roots of the equation px^2 + qx+r=0 th...

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  13. If x-c is a factor of order m of the polynomial f(x) of degree n (1 < ...

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  14. If x-c is a factor of order m of the polynomial f(x) of degree n (1 < ...

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  15. If a and b are two distinct real roots of the polynomial f(x) such th...

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  16. If ax^3+ bx - c is divisible by x^2+bx+c, then 'a' is a root of the ...

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  17. If alpha,beta are the roots of x^2+p x+q=0a n dx^(2n)+p^n x^n+q^n=0a n...

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  18. Root (s) of the equation 9x ^(2) -18|x|+5=0 belonging to the domain of...

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  19. If x=1+i is a root of the equation =x^3-i x+1-i=0, then the other real...

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  20. Let a, b, c be real numbers, a != 0. If alpha is a zero of a^2 x^2+bx...

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