What is expand (pi(r+3)^2)-(pi*r^2) ?

The solution to expand (pi(r+3)^2)-(pi*r^2) is 6pir+9pi

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expand (pi(r+3)^2)-(pi*r^2)

expand

(π (r + 3)^{2}) - (π \cdot r^{2})

6 π r + 9 π

Solution steps

(π (r + 3)^{2}) - (π r^{2})

Remove parentheses:

(a) = a

= π (r + 3)^{2} - π r^{2}

(r + 3)^{2} = r^{2} + 6 r + 9

= π (r^{2} + 6 r + 9) - π r^{2}

Expand

π (r^{2} + 6 r + 9) : π r^{2} + 6 π r + 9 π

= π r^{2} + 6 π r + 9 π - π r^{2}

Simplify

π r^{2} + 6 π r + 9 π - π r^{2} : 6 π r + 9 π

= 6 π r + 9 π

\frac{d ^{2}}{d x ^{2}} ((2 x^{2} - 1) e^{- x^{2}}) + 5

\frac{( + 4 s ^{2} - 3 s - 1 ) ( 2 s + 2 )}{s}

6 (9 + 2)

\frac{( π \cdot ( 3 \cdot x - 3 x ) )}{3}

2 z (e^{x yz} x yz + e^{x yz})

What is expand (pi(r+3)^2)-(pi*r^2) ?
The solution to expand (pi(r+3)^2)-(pi*r^2) is 6pir+9pi