" 18.If "3x+(2)/(x)=7," then "(9x^(2)-(4)/(x^(2)))=

If 3x+(2)/(x)=7, then (9x^(2)-(4)/(x^(2)))=25 (b) 35(c)49(d)30

If (3x-(2)/(x))=5 , then the value of (9x^(2)-(4)/(x^(2))) is :

If 3x+2/x=7, then (9x^2-4/(x^2))=? (a)25 (b) 35 (c) 49 (d) 30

(9x+7)/(2)-(x-(x-2)/(7))=36

Simplify (x+4)/(3x+4y) xx (9x^(2) - 16y^(2))/(2x^(2) +3x-20)

If 2x-1/(3x)=y then 9x^2+1/(4x^2) in terms of y is

Obtain the differential coefficient of the following : (i) (x-1) (2x+5) (ii) (9x^(3)-8x+7)(3x^(2)+5) (iii) 1/(2x+1) (iv) (3x+4)/(4x+5) (v) (x^(2))/(x^(3)+1)

(x+1)(x+2)(x+6)=x^(3)+9x^(2)+4(7x-1)

Simplify the following : 5x^(4) - 7x^(2) +8x - 1 +3x^(2) - 9x^(2) + 7 - 3x^(4)+11x - 2 +8x^(2)