What is expand pi(-x^2-4x)^2 ?

The solution to expand pi(-x^2-4x)^2 is pix^4+8pix^3+16pix^2

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expand pi(-x^2-4x)^2

expand

π (- x^{2} - 4 x)^{2}

π x^{4} + 8 π x^{3} + 16 π x^{2}

Solution steps

π (- x^{2} - 4 x)^{2}

(- x^{2} - 4 x)^{2} = x^{4} + 8 x^{3} + 16 x^{2}

= π (x^{4} + 8 x^{3} + 16 x^{2})

Distribute parentheses

= π x^{4} + π 8 x^{3} + π 16 x^{2}

= π x^{4} + 8 π x^{3} + 16 π x^{2}

\frac{1}{( s + 6 ) ( s - 4 )}

\frac{c ( cosh ( 2 x ) + 1 )}{( 2 )}

\frac{3 x ( x + 1 )}{( x - 5 )}

\frac{4}{( s + 4 ) ( s + 3 )}

\frac{7 + x ( 2 x + 3 )}{20}

What is expand pi(-x^2-4x)^2 ?
The solution to expand pi(-x^2-4x)^2 is pix^4+8pix^3+16pix^2