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Which among the following is a quadratic...

Which among the following is a quadratic equation?

A

`(2x + 1)^2 = 4x^2 + 4x + 1`

B

`(sqrt3x + 1)^2 = 3x^2 + 10`

C

`10x^3 + 2x^2 = 5x(sqrt2x + 1)^2`

D

`3x^2 - 2x + 10 = 5x^3`

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UNITED BOOK HOUSE-Quadratic equation in one variable -Exercise
  1. If the equations x^2 + 2x + 3 = 0 and ax^2 + bx + + c = 0 have common ...

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  2. Let a(b - c)x^2 + b(c - a)x + c(a -b) = 0 has two equal roots. The tru...

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  3. The roots of the equation ax^2 - bx + c = 0 are

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  4. Sum of two roots of 2x^2 + ax + 6 = 0 is 5. Then the value of a is

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  5. Two roots of 4x^2 - px + 9 = 0 are equal. Then P equals

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  6. Two roots of 5x^2 + 7x + 3 = 0 are alpha and beta. The value of (alpha...

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  7. Which among the following is a quadratic equation?

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  8. The sum of two roots of x^2 - px + q = 0 is thrice of their difference...

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  9. alpha,beta be the roots of x(x -3) =4. Then (alpha^2 + beta^2) equals

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  10. Two roots of x^2 - (a + b)x + ab = 0 (a, b are rational) are

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  11. If p and q are the two roots of the equation x^2 + px + q = 0, then fi...

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  12. Solve for x : x/x+1 + x+1/x = 34/15

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  13. The hypotenuse of a right angled triangle is 6 cm more than twice the ...

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  14. A moter boat whose speed is 18 km/hr in still water takes 1 hour more ...

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  15. Find two consecutive numbers whose squares have the sum 85

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  16. Solve for x : sqrt3x^2 - 2sqrt2x - 2sqrt3 = 0

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  17. Solve for x : x^2 + x/2 - 1 = 0

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  18. Solve for Z : 36z^2 - 12cz + (c^2 - d^2) = 0

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  19. If x = sqrt(1 + sqrt(1 + sqrt(1 + ........prop))). Then x is equal to

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  20. 300 marbels are distributed equally among a certain number of students...

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