Evaluate
5x\left(x+42\right)
Expand
5x^{2}+210x
Graph
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200+10x+5\left(20+x\right)^{2}-200-2000
Use the distributive property to multiply 10 by 20+x.
200+10x+5\left(400+40x+x^{2}\right)-200-2000
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(20+x\right)^{2}.
200+10x+2000+200x+5x^{2}-200-2000
Use the distributive property to multiply 5 by 400+40x+x^{2}.
2200+10x+200x+5x^{2}-200-2000
Add 200 and 2000 to get 2200.
2200+210x+5x^{2}-200-2000
Combine 10x and 200x to get 210x.
2000+210x+5x^{2}-2000
Subtract 200 from 2200 to get 2000.
210x+5x^{2}
Subtract 2000 from 2000 to get 0.
200+10x+5\left(20+x\right)^{2}-200-2000
Use the distributive property to multiply 10 by 20+x.
200+10x+5\left(400+40x+x^{2}\right)-200-2000
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(20+x\right)^{2}.
200+10x+2000+200x+5x^{2}-200-2000
Use the distributive property to multiply 5 by 400+40x+x^{2}.
2200+10x+200x+5x^{2}-200-2000
Add 200 and 2000 to get 2200.
2200+210x+5x^{2}-200-2000
Combine 10x and 200x to get 210x.
2000+210x+5x^{2}-2000
Subtract 200 from 2200 to get 2000.
210x+5x^{2}
Subtract 2000 from 2000 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}