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Solve the following : 5 x^2 + 4x -7 = 0...

Solve the following : `5 x^2 + 4x -7 = 0`

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The correct Answer is:
0.894 or - 1.649
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PRADEEP-MATHEMATICAL TOOLS-PROBLEMS FOR PRACTICE
  1. Solve the followings : x^2 +4x - 5 = 0

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  2. Solve the following equation , 3x^2 +6x -9 =0

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  3. Solve the following : 5 x^2 + 4x -7 = 0

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  4. Solve the equation for x : 4x^2 - 4ax + (a^2 -b^2) = 0.

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  5. Expand using binomial (1+3 x)^3 upto the term having x^3.

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  6. Evaluate (999)^(1//3) upto 4 places of decimal.

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  7. Evaluate sqrt(26) correct upto four places of decimal.

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  8. The value of acceleration due to gravity (g) at height h above the sur...

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  9. Simplify the following. Using Binomial theoremE=K[(1+(Deltatheta)/thet...

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  10. Evaluate (1.056)^(1//3) correct up to the four places of decimal.

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  11. Identify , whether the following equation represent a straight line , ...

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  12. Identify , whether the following equation represent a straight line , ...

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  13. Identify , whether the following equation represent a straight line , ...

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  14. Find the value of the following : (a) sin ( - 30^(@)) (b) cos (-60^(@...

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  15. Find the value of the following : (a) sin 120^(@) (b) cos 135^(@) (c ...

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  16. Find the value of the following : (a) sin 210^(@) (b) cos 220^(@) (c ...

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  17. If sin theta = 3//5, find the values of costheta and tantheta.

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  18. An inclined plane rises 1 in 10. if the length of the inclined plane i...

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  19. Simplify the following : (i) (0.0036)^(1//5) (ii) (0.056)^(2//3) (ii...

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  20. Simplify the following : (i) (0.05246)^(1//8) - 2.6055 (ii) (3.142xx...

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