What is expand pi(9-y)^2 ?

The solution to expand pi(9-y)^2 is piy^2-18piy+81pi

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expand pi(9-y)^2

expand

π (9 - y)^{2}

π y^{2} - 18 π y + 81 π

Solution steps

π (9 - y)^{2}

(9 - y)^{2} = 81 - 18 y + y^{2}

= π (y^{2} - 18 y + 81)

Distribute parentheses

= π 81 + π (- 18 y) + π y^{2}

Apply minus-plus rules

+ (- a) = - a

= 81 π - 18 π y + π y^{2}

Rewrite in standard form

= π y^{2} - 18 π y + 81 π

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