desarrollar 2pi*r^2(3-r)

Solución

desarrollar

2 π \cdot r^{2} (3 - r)

- 2 π r^{3} + 6 π r^{2}

Pasos de solución

2 π r^{2} (3 - r)

Poner los parentesis utilizando:

a (b - c) = ab - a c

a = 2 π r^{2}, b = 3, c = r

= 2 π r^{2} \cdot 3 - 2 π r^{2} r

= 2 \cdot 3 π r^{2} - 2 π r^{2} r

Simplificar

2 \cdot 3 π r^{2} - 2 π r^{2} r : - 2 π r^{3} + 6 π r^{2}

= - 2 π r^{3} + 6 π r^{2}

\frac{d}{d x} ((m) (x^{2} - 1))

e x p an d 10 + (x^{2} + 6 x - 1)

e x p an d - \frac{2 s ^{2} + 4 s + 3}{( s + 1 ) s ^{2}}

e x p an d x y d x + (7 x^{2} + 9 x + 2 x^{3} y^{5} - 2) d y

e x p an d 26 x^{4} 5