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What is the value of C, if ax^2 + bx +c ...

What is the value of C, if `ax^2 + bx +c =0` has equal roots ?

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The correct Answer is:
`c=(b^(2))/(4a)`
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CPC CAMBRIDGE PUBLICATION-MODEL QUESTION PAPER 7 -QUESTIONS
  1. When 2 unbiased coins are tossed at a time, the probability of getting...

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  2. If the product of zeroes of polynomial f(y) =ay^3 - 6y^2 + 11y -6 is 4...

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  3. What is the value of C, if ax^2 + bx +c =0 has equal roots ?

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  4. Find the second term if sum of the 'n' tem of an AP is 2n^2 +1 .

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  5. State converse of Pythagoras Theorem.

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  6. What is the p/q(p,q in z ,q !=0) form of 0.5bar(7) ?

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  7. If sin theta =1/3 , then find the value of (2cot^2 theta +2)

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  8. In sin(A+B)=sqrt(3)/2 and cos(A-B)=1, 0 lt A + B lt 90^(@), A ge B.

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  9. The surface area of a sphere is same as the C.S.A of a right circular ...

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  10. By Euclid's division lemma, show that the square of any positive integ...

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  11. Solve: (x+y)/(xy)=2 and (x-y)/(xy)=6

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  12. Solve : y^(2)-(sqrt(3)+1)y+sqrt(3)=0

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  13. Show that the points (3, 2) (-2, -3) and (2, 3) are collinear or non-c...

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  14. In the given fig DeltaDGH~DeltaDEF, DH=8cm, DF=12cm, DG=(3x-1)cm and D...

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  15. A card is drawn at random from a box containing 21 cards numbered 1 to...

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  16. Draw a circle of radius 3cms. Construct a pair of tangents to it, from...

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  17. Express sinA and sec A in terms of cot A. OR If tan theta+sin thet...

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  18. The sum of the numerator and decominator of a fraction is 24. If 4 is ...

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  19. If the zeroes of the polynomial x^4-6x^3-26x^2+138x-35 are 2+-sqrt3 Fi...

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  20. A two digit number is such that the product of its digits is 18. when ...

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