Evaluate
\left(x+7\right)\left(3x+4\right)
Expand
3x^{2}+25x+28
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3x^{2}+21x+4x+28
Apply the distributive property by multiplying each term of 3x+4 by each term of x+7.
3x^{2}+25x+28
Combine 21x and 4x to get 25x.
3x^{2}+21x+4x+28
Apply the distributive property by multiplying each term of 3x+4 by each term of x+7.
3x^{2}+25x+28
Combine 21x and 4x to get 25x.
Examples
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{ 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
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Limits
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