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If one root of the equation x^2+bx+8=0 b...

If one root of the equation `x^2+bx+8=0` be 4 and the roots of the equation `x^2+bx+c=0` are equal , find the value of c.

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The correct Answer is:
c=9
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CHHAYA PUBLICATION-QUADRATIC EQUATIONS-EXERCISE 5A(Short answer type question)
  1. In a quadratic equation of the form x^2+mx+n=0 the constant term is mi...

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  2. For what value of m the roots of the equation (m+1)x^2+2(m+3)x+m+8=0 a...

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  3. If one root of the equation x^2+bx+8=0 be 4 and the roots of the equat...

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  4. For what value of m the roots of the equation 3/(x+3+m)+5/(x+5+m)=1 ar...

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  5. Find the condition so that the roots of the equation a/(x-a)+b/(x-b)=5...

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  6. Show that the roots of each of the following equations are rational(a,...

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  7. Show that the roots of each of the following equations are rational(a,...

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  8. Show that the roots of the equation (a^2-bc)x^2+2(b^2-ca)x+c^2-ab=0 ar...

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  9. If one root of the equation qx^2+px+q=0 (p,q are real) be imaginary, s...

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  10. If the roots of the equation qx^2+2px+2q=0 are real and unequal, prove...

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  11. If the roots of the equation x^2-2(a+b)x+a(a+2b+c)=0 be equal , prove ...

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  12. If the equation x^2+px+q=0andx^2+p'x+q'=0 have a common root , prove t...

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  13. Prove that if the equations x^2+px+r=0 and x^2+rx+p=0 have a common ro...

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  14. IF x is real and the expressions 3x^2-17x+20 is always positive, show ...

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  15. Find the limits of real value of x so that the expressions 5x^2+6x-8 i...

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  16. For any real positive value of x, show that 3-xcancelgt7/(x+2).

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  17. If x is real can the value of 3+2x-x^2 be greater than 4,

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  18. If x is real can that of x^2+3x+1 less than (-5/4)?

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  19. Show that if x is real and x^2+5lt6x , then x must lie between 1 and ...

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  20. If x is real, find the real values of p which make 4x^2+px+1 always p...

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