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If acute angle between lines ax^(2)+2hxy...

If acute angle between lines `ax^(2)+2hxy+by^(2)=0` is congruent to that between lines `2x^(2)-5xy+3y^(2)=0` and `k(h^(2)-ab)=(a+b)^(2)` then `k=`

A

`-(10)^(2)`

B

`(-10)^(2)`

C

`-10`

D

`10`

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The correct Answer is:
B
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TARGET PUBLICATION-PAIR OF STRAIGHT LINES-CRITICAL THINKING
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  2. If the angle between the lines represented by the equation y^2+kxy-x^2...

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  3. If acute angle between lines ax^(2)+2hxy+by^(2)=0 is congruent to that...

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  4. If the acute angle between the pairs of lines 3x^2-7xy+4y^2=0 and 6x^2...

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  5. The lines a^2x^2+bcy^2=a(b+c)xy will be coincident , if

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  6. If the lines (p-q)x^2+2(p+q)xy+(q-p)y^2=0 are mutually perpendicular ,...

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  7. The two lines represented by 3a x^2+5x y+(a^2-2)y^2=0 are perpendicula...

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  8. The angle between the lines given by the equation alphay^(2)+(1-alpha^...

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  9. If the equation ax^(2)+ay^(2)+2gx+2fy+c=0 represents a pair of lines t...

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  10. If the equation ax^2+by^2+cx+cy=0 represents a pair of straight lines ...

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  11. If the equation hxy + gx + fy + c = 0 represents a pair of straight li...

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  12. The angle between the pair of straight lines 2x^2+5xy+2y^2+3x+3y+1=0 i...

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  13. If the angle between the pair of straight lines represented by the equ...

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  14. If the angle between the two lines given by ax^(2)+2hxy+by^(2)+2gx+2fy...

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  15. The equation x^2 - 3xy+ lambday^2 + 3x - 5y + 2 = 0 where lambda is a ...

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  16. Lines represented by 9x^(2)+y^(2)+6xy-4=0 are

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  17. The equation ax^(2)+2hxy+by^(2)+2gx+2fy+c=0 represents a circle if

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  18. Equation x^(2) +k(1)y^(2) +2k(2)y = a^(2) represents a pair of perpend...

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  19. The equation (x^(2)+y^(2))(h^(2)+k^(2)-a^(2))=(hx+ky)^(2) represents a...

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  20. The equation 2x^2+4xy-py^2+4x+qy+1=0 will represent two mutually perpe...

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