What is expand pi*(7.5x+21)^2 ?

The solution to expand pi*(7.5x+21)^2 is 176.71458…x^2+989.60168…x+1385.44236…

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expand pi*(7.5x+21)^2

expand

π \cdot (7.5 x + 21)^{2}

176.71458 \dots x^{2} + 989.60168 \dots x + 1385.44236 \dots

Solution steps

π (7.5 x + 21)^{2}

(7.5 x + 21)^{2} = 56.25 x^{2} + 315 x + 441

= π (56.25 x^{2} + 315 x + 441)

Distribute parentheses

= π 56.25 x^{2} + π 315 x + π 441

= 56.25 π x^{2} + 315 π x + 441 π

Simplify

56.25 π x^{2} + 315 π x + 441 π : 176.71458 \dots x^{2} + 989.60168 \dots x + 1385.44236 \dots

= 176.71458 \dots x^{2} + 989.60168 \dots x + 1385.44236 \dots

(p + cos (qt) - e^{- t}) (θ (t - \frac{π}{2}))

\frac{40 ( 4 cos ( 40 t ) + sin ( 40 t ) )}{17}

\frac{1282.5 - 16.245 x ^{2} + 114 x}{( 45 + 0.57 x ^{2} ) ^{2}}

\frac{2 - 2 x ^{2}}{( x ^{2} + 4 ) ( x + 8 )}

(e^{- 2 t} - e^{- 3 t}) \frac{1}{2} (1 - e^{- 2 t})

What is expand pi*(7.5x+21)^2 ?
The solution to expand pi*(7.5x+21)^2 is 176.71458…x^2+989.60168…x+1385.44236…