Evaluate
x\left(16-x^{2}\right)
Expand
16x-x^{3}
Graph
Share
Copied to clipboard
\left(-\frac{1}{3}x\times 3x-\frac{1}{3}x\times 12\right)\left(x-4\right)
Use the distributive property to multiply -\frac{1}{3}x by 3x+12.
\left(-\frac{1}{3}x^{2}\times 3-\frac{1}{3}x\times 12\right)\left(x-4\right)
Multiply x and x to get x^{2}.
\left(-x^{2}-\frac{1}{3}x\times 12\right)\left(x-4\right)
Cancel out 3 and 3.
\left(-x^{2}+\frac{-12}{3}x\right)\left(x-4\right)
Express -\frac{1}{3}\times 12 as a single fraction.
\left(-x^{2}-4x\right)\left(x-4\right)
Divide -12 by 3 to get -4.
-x^{3}+4x^{2}-4x^{2}+16x
Apply the distributive property by multiplying each term of -x^{2}-4x by each term of x-4.
-x^{3}+16x
Combine 4x^{2} and -4x^{2} to get 0.
\left(-\frac{1}{3}x\times 3x-\frac{1}{3}x\times 12\right)\left(x-4\right)
Use the distributive property to multiply -\frac{1}{3}x by 3x+12.
\left(-\frac{1}{3}x^{2}\times 3-\frac{1}{3}x\times 12\right)\left(x-4\right)
Multiply x and x to get x^{2}.
\left(-x^{2}-\frac{1}{3}x\times 12\right)\left(x-4\right)
Cancel out 3 and 3.
\left(-x^{2}+\frac{-12}{3}x\right)\left(x-4\right)
Express -\frac{1}{3}\times 12 as a single fraction.
\left(-x^{2}-4x\right)\left(x-4\right)
Divide -12 by 3 to get -4.
-x^{3}+4x^{2}-4x^{2}+16x
Apply the distributive property by multiplying each term of -x^{2}-4x by each term of x-4.
-x^{3}+16x
Combine 4x^{2} and -4x^{2} to get 0.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}