Evaluate
9\left(x-4\right)\left(5x-19\right)
Expand
45x^{2}-351x+684
Graph
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45\left(x^{2}-8x+16\right)+9\left(x-4\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-4\right)^{2}.
45x^{2}-360x+720+9\left(x-4\right)
Use the distributive property to multiply 45 by x^{2}-8x+16.
45x^{2}-360x+720+9x-36
Use the distributive property to multiply 9 by x-4.
45x^{2}-351x+720-36
Combine -360x and 9x to get -351x.
45x^{2}-351x+684
Subtract 36 from 720 to get 684.
45\left(x^{2}-8x+16\right)+9\left(x-4\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-4\right)^{2}.
45x^{2}-360x+720+9\left(x-4\right)
Use the distributive property to multiply 45 by x^{2}-8x+16.
45x^{2}-360x+720+9x-36
Use the distributive property to multiply 9 by x-4.
45x^{2}-351x+720-36
Combine -360x and 9x to get -351x.
45x^{2}-351x+684
Subtract 36 from 720 to get 684.
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}