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CBSE Class 10 Answered

If alpha and beta are the zeros of quadratic polynomial x^2+x-2 ,then value of 1/alpha-1/beta=?
Asked by sujatamallick84 | 01 Nov, 2018, 09:06: PM
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begin mathsize 16px style straight x squared space plus space straight x space minus space 2 space Since space straight alpha space and space straight beta space are space the space zeroes space of space straight x squared space plus space straight x space minus space 2 space. rightwards double arrow straight x squared space plus space straight x space minus space 2 space space equals space 0 space rightwards double arrow open parentheses straight x space plus 2 space close parentheses open parentheses straight x space minus 1 space close parentheses space equals space 0 rightwards double arrow straight x space equals space minus space 2 comma space straight x space equals space 1 rightwards double arrow straight alpha space equals space minus 2 space and space straight beta space equals space 1 Therefore space 1 over straight alpha space minus space 1 over straight beta space equals space fraction numerator 1 over denominator negative 2 end fraction space minus space 1 over 1 space equals space minus 3 over 2 end style
Answered by Yasmeen Khan | 02 Nov, 2018, 10:41: AM

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CBSE 10 - Maths
PQ is a chord of length 8 cm to a circle of radius 5 cm. The tangents P and Q intersect at a point T. Find the length of the tangent TP.
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CBSE 10 - Maths
if one of the zeroes of quadratic polynomial F(x) = 4x² - 8kx - 9 is equal in magnitude but opposite in sign, find K
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CBSE 10 - Maths
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the poles AB and CD of different heights are standing vertically on the ground level from a point P on the line joining the foots of the pole on the level of ground the angle of elevation to the top of the pole are founded to be complementary the of the CD and the distance PD 20√3m and 20m respectively if the BP is 10m then find the length of AB and the distance AC between the tpo of the poles
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CBSE 10 - Maths
from the pair of linear equations in the following problems and find their solution graphically 10 students of class 10 to part in a mathematic quiz if the number of girls is for more than the number of boys find the number of boys and girls who took part in the quiz
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CBSE 10 - Maths
maths
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Asked by sonawnerohan01 | 23 Mar, 2024, 12:25: PM
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CBSE 10 - Maths
The distance of the point (5,-2) from x-axis will be :-
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CBSE 10 - Maths
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CBSE 10 - Maths
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A blacksmith has a rectangular sheet of iron. He has to make a cylindrical vessel both circular ends are closed. When he minimizes the wastage of the sheet of iron, then what is the ratio of the wastage to the utilised area of sheet?
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Asked by jagdishdabang79 | 18 Mar, 2024, 08:40: PM
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