`((2x)/(5)-(3y)/(7))((9y^(2))/(49)+(4x^(2))/(25)+(6xy)/(35))` का मान ज्ञात कीजिए ।

Find the following products: (i) (0.9x+0.7y)(0.81x^(2)-0.63xy+0.49y^(2)) (ii) ((2x)/(5)-(3y)/(7))((9y^(2))/(49)+(4x^(2))/(25)+(6xy)/(35))

(x^(2))/(4)-3xy^(3)+9y^(6)

Find the following products: (i) (0. 9 x+0. 7 y)(0. 81 x^2-0. 63 x y+0. 49 y^2) (ii) ((2x)/5-(3y)/7)((9y^2)/(49)+(4x^2)/(25)+(6x y)/(35))

dy/dx का मान ज्ञात कीजिए यदि x=2at,y=at^2

Find the value of 309 div [(3/2) of (25+35)- 12 3/4] . 309 div [(3/2) of (25+35)- 12 3/4] का मान ज्ञात कीजिए।

(5x + 3y) (5x-3y) (25x ^ (2) + 9y ^ (2))

Find co - ordinates of foci, water length of major axis and minor aixs, eccentricity and length of latus rectum of following ellipse. Length of latus rectum of following ellipse. (1) 16x^(2) + 9y^(2) = 1 (2) 3x^(2) + 2y^(2) = 6 (3) 4x^(2) + 9y^(2) = 1 (4) (x^(2))/(49) + (y^(2))/(16) = 1 (5) 9x^(2) + 25y^(2) = 225 (6) 7x^(2) + 10y^(2) = 70 (7) 16x^(2) + 5y^(2) = 80

If x^(4)+7x^(2)y^(2)+9y^(4)=24xy^(3) then (dy)/(dx)=

Add the following (8)/(5)x+(11)/(7)y+(9)/(4)xy,-(3)/(2)x-(5)/(3)y-(9)/(5)xy

Factorise 25x^(2) - 30xy + 9y^(2) . The following steps are involved in solving the above problem . Arrange them in sequential order . (A) (5x - 3y)^(2) " " [ because a^(2) - 2b + b^(2) = (a-b)^(2)] (B) (5x)^(2) - 30xy + (3y)^(2) = (5x)^(2) - 2(5x)(3y) + (3y)^(2) (C) (5x - 3y) (5x - 3y)