Evaluate
2\left(x+3\right)\left(x+7\right)
Expand
2x^{2}+20x+42
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2x^{2}+14x+6x+42
Apply the distributive property by multiplying each term of 2x+6 by each term of x+7.
2x^{2}+20x+42
Combine 14x and 6x to get 20x.
2x^{2}+14x+6x+42
Apply the distributive property by multiplying each term of 2x+6 by each term of x+7.
2x^{2}+20x+42
Combine 14x and 6x to get 20x.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
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Matrix
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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
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