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The value k for which 4x^2+8x y+k y^2=9 ...

The value `k` for which `4x^2+8x y+k y^2=9` is the equation of a pair of straight lines is__________

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CENGAGE ENGLISH-STRAIGHT LINES-All Questions
  1. If the slope of one line is double the slope of another line and the ...

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  2. Find the combined equation of the pair of lines through the point (1, ...

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  3. The value k for which 4x^2+8x y+k y^2=9 is the equation of a pair of s...

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

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  5. If two lines represented by x^4+x^3y+c x^2y^2-x y^3+y^4=0 bisector of ...

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  6. The straight lines represented by x^2+m x y-2y^2+3y-1=0 meet at (a)(...

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  7. The straight lines represented by the equation 135 x^2-136 x y+33 y^2=...

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  8. If one of the lines of m y^2+(1-m^2)x y-m x^2=0 is a bisector of the ...

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  9. Statement 1 : If -2h=a+b , then one line of the pair of lines a x^...

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  10. Show that all chords of the curve 3x^2-y^2-2x+4y=0, which subtend a ri...

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  11. Area of the triangle formed by the lines x^2 + 4xy + y^2=0 and x - y=4...

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  12. The distance between the lines (x+7y)^2+4sqrt(2)(x+7y)-42=0 is

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  13. x+y=7 and a x^2+2h x y+a y^2=0,(a!=0) , are three real distinct lines ...

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  14. If the slope of one of the lines represented by a x^2+2h x y+b y^2=0 i...

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  15. int{(2 - 3sinx)/cos^2x}

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  16. The sides of a triangle have the combined equation x^2-3y^2-2x y+8y-4=...

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  17. Let P Q R be a right-angled isosceles triangle, right angled at P(2,1...

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  18. The combined equation of three sides of a triangle is (x^2-y^2)(2x+3y-...

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  19. Find the equation of the bisectors of the angles between the lines ...

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  20. If theta is the angle between the lines given by the equation 6x^2+5x ...

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