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If x is real, prove that the quadratic e...

If x is real, prove that the quadratic expression (i) (x-2)(x+3)+7 is always positive.
(ii) `4x-3x^(2)-2` is always negative.

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ICSE-QUADRATIC EQUATIONS-CHAPTER TEST
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  2. If one root of 2x^(2)-5x+k=0 be double the other, find the value of k.

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  3. If alpha,beta be the roots of the equation x^(2)-x-1=0, determine the ...

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  4. If the roots of the equation ax^(2)+bx+c=0 be in the ratio 3:4, show t...

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  5. If x is real, prove that the quadratic expression (i) (x-2)(x+3)+7 is ...

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  6. Draw the graph of the quadratic function x^(2)-4x+3 and hence find the...

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  7. For what real values of a, will the expression x^(2)-ax+1-2a^(2), for ...

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  8. If x be real, prove that the value of (2x^(2)-2x+4)/(x^(2)-4x+3) canno...

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  9. If the roots of the equation qx^(2)+2px+2q=0 are real and unequal, pro...

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  10. If alpha,beta be the roots of x^(2)-px+q=0, find the value of alpha^(5...

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  11. If the difference between the roots of the equation x^(2)+ax+1=0 is le...

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  12. Let alpha,beta be the roots of the equation x^(2)-px+r=0 and alpha//2,...

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  13. alpha,beta are the roots of ax^(2)+2bx+c=0 and alpha+delta,beta+delta ...

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  14. If alpha,beta are the roots of the equation x^(2)-2x-1=0, then what is...

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  15. If the roots of the quadratic equation x^(2)+px+q=0 are tan 30^(@) and...

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  16. If both the roots of the quadratic equation x^(2)-2kx+k^(2)+k-5=0 are ...

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  17. If alpha and beta are the roots of ax^(2)+bx+c=0 and if px^(2)+qx+r=0...

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  18. The quadratic equations x^(2)-6x+a=0 and x^(2)-cx+6=0 have one root in...

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  19. If alpha,beta are the roots of the equation lamda(x^(2)-x)+x+5=0 and i...

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  20. If alpha,beta be the roots of x^(2)-a(x-1)+b=0, then the value of (1)/...

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