`9x^2+25-30 x` can be expressed as the square of `3x^2-25` (b) `3x-5` (c) `-3x-5` (d) `3x-5`

9x^(2)+25-30x can be expressed as the square of 3x^(2)-25 (b) 3x-5(c)-3x-5 (d) 3x-5

Which of the following quadratic expression can be expressed as a product of real linear factors? (a) x^(2)-2x+3 (b) 3x^(2)-sqrt2x-sqrt3 (c) 2x^(2)+3x-4 (d) sqrt2x^(2)-sqrt5x+3

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

If 9x^2+25 y^2=181 and x y=-6, find the value of 3x+5y

If 3x+5y=11 and xy=2, find the value of 9x^(2)+25y^(2)

(x+3)/(7)-(2x-5)/(3)=(3x-5)/(5)-25

If 3x+5y=11\ a n d\ x y=2, find the value of 9x^2+25 y^2