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CBSE Class 10 Answered

solve the pair of linear equation by cross multiplication method ax+by=a-b, bx-ay=a+b
Asked by goldi2507 | 26 Jun, 2018, 11:12: AM
answered-by-expert Expert Answer
begin mathsize 16px style ax plus by equals straight a minus straight b................... left parenthesis 1 right parenthesis bx minus ay equals straight a plus straight b................... left parenthesis 2 right parenthesis left parenthesis 1 right parenthesis cross times straight a plus left parenthesis 2 right parenthesis cross times straight b open parentheses straight a squared plus straight b squared close parentheses straight x equals straight a squared minus ab plus ab plus straight b squared straight x equals fraction numerator straight a squared plus straight b squared over denominator straight a squared plus straight b squared end fraction equals 1 put space straight x equals 1 space in space left parenthesis 1 right parenthesis straight y equals negative 1 end style
Answered by Arun | 28 Jun, 2018, 10:26: AM

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CBSE 10 - Maths
(SinA/1+CosA + 1+cosA/sinA) (sinA/1-cosA - 1-cosA/sinA)=4cosecAcotA    
Asked by prasadshruti9999 | 03 Jun, 2023, 10:05: AM
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CBSE 10 - Maths
cot2 30-2cos2 60-3/4sec2 45-4sec2 30
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CBSE 10 - Maths
find the zeroes of the quadratic polynomial and verify the relationship between the zeroes and the coffiecient 4u+8u
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CBSE 10 - Maths
if sin theta = root3/2, find the value of all t- ratios
Asked by akhilthainuan | 22 May, 2023, 02:11: PM
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CBSE 10 - Maths
If α and β are tge zeros of the polynomial x^2 - 6x + k and 3α + 2β=20 , then the value of k is
Asked by ruchipandey20071978 | 21 May, 2023, 10:00: PM
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CBSE 10 - Maths
If one of the zeros of the quadratic polynomial (k - 1)x^2 + kx + 1 is -3, then the value of k
Asked by ruchipandey20071978 | 21 May, 2023, 09:57: PM
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CBSE 10 - Maths
If the sum of the zeors of the polynomial f (x)=2x^3 - 3kx^2 +4x - 5 is 6 , then the value of k is
Asked by ruchipandey20071978 | 21 May, 2023, 05:32: PM
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CBSE 10 - Maths
If two zeros of x^3 + x^2 - 5x - 5 are √5 and - √5, then its third zero is
Asked by ruchipandey20071978 | 21 May, 2023, 05:29: PM
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CBSE 10 - Maths
The value of k for which the system of equestions kx-y=2 and 6x-2y=3 has a uniqe solution is..
Asked by ruchipandey20071978 | 11 May, 2023, 06:55: AM
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CBSE 10 - Maths
a regular polygon has 20 sides. how many triangles can be drawn by using the vertices but not using the sides?
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