What is expand f(1,-2)9x^2y-4xy^2 ?

The solution to expand f(1,-2)9x^2y-4xy^2 is 9*1*fx^2y,-9*2fx^2y-4xy^2

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expand f(1,-2)9x^2y-4xy^2

expand

f (1, - 2) 9 x^{2} y - 4 x y^{2}

9 \cdot 1 \cdot f x^{2} y, - 9 \cdot 2 f x^{2} y - 4 x y^{2}

Solution steps

f (1, - 2) \cdot 9 x^{2} y - 4 x y^{2}

= 9 (1, - 2) f x^{2} y - 4 x y^{2}

Expand

f \cdot 9 x^{2} y (1, - 2) : 9 \cdot 1 \cdot f x^{2} y, - 9 \cdot 2 f x^{2} y

= 9 \cdot 1 \cdot f x^{2} y, - 9 \cdot 2 f x^{2} y - 4 x y^{2}

x^{2} + y^{2} + (z - 1)^{2}

x (2, 3, 0, - 1) + y (- 5, 4, 3, 2) + z (1, - 2, 2, 5)

\frac{d}{d h} ((V (h)) ((3 h^{2} + 4)^{\frac{3}{2}} - 8))

\frac{5 ( 9 + 201 )}{3}

\frac{4000}{( t + 2 ) ^{2}}

What is expand f(1,-2)9x^2y-4xy^2 ?
The solution to expand f(1,-2)9x^2y-4xy^2 is 9*1*fx^2y,-9*2fx^2y-4xy^2