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If the sum of the slopes given by ax^(2)...

If the sum of the slopes given by `ax^(2)+8xy+5y^(2)=0` is twice their product, then a=

A

`-8`

B

`2`

C

`4`

D

`-4`

Text Solution

Verified by Experts

The correct Answer is:
D
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NIKITA PUBLICATION-PAIR OF STRAIGHT LINES-MULTIPLE CHOICE QUESTIONS
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  3. If the sum of the slopes given by ax^(2)+8xy+5y^(2)=0 is twice their p...

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  7. If the slopes of one of the line given by 3x^(2)+4xy+ky^(2)=0 is three...

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  8. If the ratio of gradients of the line given by ax^(2)+2hxy+by^(2)=0 i...

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  9. If the slope of one of the line given by ax^(2)+2hxy+by^(2)=0 is four ...

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  10. If the slope of one of the lines given by 4x^(2)+kxy+y^(2)=0 is four t...

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  11. If the sum of slopes of the lines given by 3x^(2)+kxy-9y^(2)=0 is 5 ti...

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  12. The difference of the slopes of the lines given by 3x^(2)-4xy+y^(2)=0 ...

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  13. The slopes of the lines given by 12x^(2)+bxy-y^(2)=0 differ by 6, Then...

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  14. If slopes of lines represented by kx^(2)+5xy+y^(2)=0 differ by 1, then...

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  15. If the slopes of the lines represented by 3x^(2)+kxy-y^(2)=0 differ by...

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  16. If the slope of one of the lines given by kx^(2)+4xy-y^(2)=0 exceeds t...

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  19. If two lines represented by x^2(tan^2theta+cos^2theta)-2xytantheta+y^2...

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