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If x-y = 13 and xy = 25, then the value ...

If x-y = 13 and xy = 25, then the value of `x^2-y^2`=?
यदि x-y = 13 और xy = 25 है, तो `x^2-y^2`=?

A

`13 sqrt 269`

B

`13 sqrt 210`

C

`13 sqrt 229`

D

`13 sqrt 240`

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PINNACLE-ALGEBRA-EXERCISE
  1. If a : b = 3 :sqrt5, then the value of (2a + b) : (3a - 2b) is: यदि...

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  2. If x + y = 4 and x^3+y^3=12, then the value of x^4+y^4=? यदि x + y =...

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  3. If x-y = 13 and xy = 25, then the value of x^2-y^2=? यदि x-y = 13 और...

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  4. If x-1/x= 8, then x^4+1/x^4 is equal to : यदि x-1/x= 8 है, तो x^4+...

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  5. If a + 3b = 12 and ab = 9, then the value of (a - 3b) is: यदि a + 3b...

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  6. If a^2+2/a^2=16, then find the value of (72a^2)/(a^4+2+8a^2).

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  7. If 1+9r^2+81r^4=256 and 1 + 3r + 9r^2= 32, then find the value of 1 - ...

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  8. If x+1/x= 4, then x^4+1/x^4 is equal to : यदि x+1/x= 4 है, तो x^4+1...

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  9. If x+1/x=5, x ne 0 then the value of (x^4 +1/x^2)/(x^2-3x+1) is equal ...

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  10. If x=3+2 sqrt2, then the value of x^2+1/x^2 is : यदि x=3+2 sqrt2, ...

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  11. If x+4/x-4=0, then the value of x^2-4 is equal to : यदि x+4/x-4=0, x...

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  12. If 4x^2+y^2=40 and xy=6,(x>0,y>0) then the value of 2x+y is: यदि 4x^...

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  13. If x^3+27y^3+64z^3=36xyz, then the relationship between x,y and z is: ...

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  14. If x= root(3)(5)+2, then the value of x^3-6x^2+12x-12 is equal to: य...

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  15. If x(5-2/x)=5/x, then the value of x^2+1/^2 is equal to: यदि x(5-2...

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  16. If a^2+1/a^2=98, a>0, then the value of a^3+1/a^3 will be: यदि a^2+...

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  17. If sqrtx= sqrt3-sqrt5, then the value of x^2-16x+6 is : यदि sqrtx= s...

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  18. If x= sqrt3/2, then the value of (sqrt(1+x)+ sqrt(1-x))/(sqrt(1+x)- sq...

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  19. If a^3+b^3=62 and a+b = 2, then the value of ab is: यदि a^3+b^3=62 ...

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  20. If a+1/a+2=0, then the value of a^15 +1/a^100 is: यदि a+1/a+2=0, और ...

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