Simplify `(11x + 3y)^(2) - (11x - 3y)^(2)`.

Simplify: x^2(x+2y)(x-3y)

Simplify: :x^(2)(x+2y)(x-3y)

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

5.Simplify : 2x-[3y-{2x-(y-x)}]

If f (x, y) = 2x ^ (3) -11x ^ (2) y + 3y ^ (3), show that: x (delta f) / (delta x) + y (delta f) / (delta y ) = 3f (x, y)

If f (x, y) = 2x ^ (3) -11x ^ (2) y + 3y ^ (3), show that: x (delta f) / (delta x) + y (delta f) / (delta y ) = 3f (x, y)

If f(x,y) =2x^(3) - 11x^(2)y + 3y^(3) , prove that x(del f)/(del x) + y(del f)/(del y)=3f .

Find 11x^(2)y xx 2xy^(2) xx 5x^(3)y^(3)

I. 12x^(2)+ 11x+12 = 10x^(2) + 22x II. 13y^(2) - 18y+3=9y^(2) - 10y